diff --git a/Cargo.lock b/Cargo.lock
index 1f7f343..f48fe72 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,20 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "adler32"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d2e7343e7fc9de883d1b0341e0b13970f764c14101234857d2ddafa1cb1cac2"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "async-std"
 version = "1.5.0"
@@ -14,7 +29,7 @@ dependencies = [
  "futures-io",
  "futures-timer",
  "kv-log-macro",
- "log",
+ "log 0.4.8",
  "memchr",
  "mio",
  "mio-uds",
@@ -35,12 +50,40 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "autocfg"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
+
 [[package]]
 name = "autocfg"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
+[[package]]
+name = "backtrace"
+version = "0.3.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1e692897359247cc6bb902933361652380af0f1b7651ae5c5013407f30e109e"
+dependencies = [
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18fbebbe1c9d1f383a9cc7e8ccdb471b91c8d024ee9c2ca5b5346121fe8b4399"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -69,6 +112,26 @@ dependencies = [
  "iovec",
 ]
 
+[[package]]
+name = "bzip2"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42b7c3cbf0fa9c1b82308d57191728ca0256cb821220f4e2fd410a72ade26e3b"
+dependencies = [
+ "bzip2-sys",
+ "libc",
+]
+
+[[package]]
+name = "bzip2-sys"
+version = "0.1.8+1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05305b41c5034ff0e93937ac64133d109b5a2660114ec45e9760bc6816d83038"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.52"
@@ -81,6 +144,35 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "chrono"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80094f509cf8b5ae86a4966a39b3ff66cd7e2a3e594accec3743ff3fabeab5b2"
+dependencies = [
+ "num-integer",
+ "num-traits",
+ "time",
+]
+
+[[package]]
+name = "cloudabi"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "crc32fast"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba125de2af0df55319f41944744ad91c71113bf74a4646efff39afe1f6842db1"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.3.9"
@@ -117,10 +209,10 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
- "autocfg",
+ "autocfg 1.0.0",
  "cfg-if",
  "crossbeam-utils 0.7.2",
- "lazy_static",
+ "lazy_static 1.4.0",
  "maybe-uninit",
  "memoffset",
  "scopeguard",
@@ -133,7 +225,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04973fa96e96579258a5091af6003abde64af786b860f18622b82e026cca60e6"
 dependencies = [
  "cfg-if",
- "lazy_static",
+ "lazy_static 1.4.0",
 ]
 
 [[package]]
@@ -142,9 +234,9 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
 dependencies = [
- "autocfg",
+ "autocfg 1.0.0",
  "cfg-if",
- "lazy_static",
+ "lazy_static 1.4.0",
 ]
 
 [[package]]
@@ -157,7 +249,7 @@ dependencies = [
  "dtoa-short",
  "itoa",
  "matches",
- "phf",
+ "phf 0.8.0",
  "proc-macro2",
  "quote",
  "smallvec",
@@ -205,6 +297,15 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "debug_unreachable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a032eac705ca39214d169f83e3d3da290af06d8d1d344d1baad2fd002dca4b3"
+dependencies = [
+ "unreachable",
+]
+
 [[package]]
 name = "derive_more"
 version = "0.99.5"
@@ -231,12 +332,57 @@ dependencies = [
  "dtoa",
 ]
 
+[[package]]
+name = "epub-builder"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec3ebff643f4f6c8b66d6121d063eb2246e4e861421360f6f9977018381f8ce2"
+dependencies = [
+ "chrono",
+ "error-chain",
+ "html2text",
+ "lazy_static 1.4.0",
+ "mustache",
+ "regex",
+ "tempdir",
+ "uuid",
+ "zip",
+]
+
+[[package]]
+name = "error-chain"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d371106cc88ffdfb1eabd7111e432da544f16f3e2d7bf1dfe8bf575f1df045cd"
+dependencies = [
+ "backtrace",
+ "version_check",
+]
+
+[[package]]
+name = "flate2"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cfff41391129e0a856d6d822600b8d71179d46879e310417eb9c762eb178b42"
+dependencies = [
+ "cfg-if",
+ "crc32fast",
+ "libc",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 
+[[package]]
+name = "fuchsia-cprng"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
+
 [[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
@@ -386,20 +532,56 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "html2text"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ef299252d5e587c661782f06d87677d2fb41e4dfc045fbc234dc7f4aa960521"
+dependencies = [
+ "backtrace",
+ "html5ever 0.24.1",
+ "html5ever-atoms",
+ "unicode-width",
+]
+
+[[package]]
+name = "html5ever"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "025483b0a1e4577bb28578318c886ee5f817dda6eb62473269349044406644cb"
+dependencies = [
+ "log 0.4.8",
+ "mac",
+ "markup5ever 0.9.0",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "html5ever"
 version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aafcf38a1a36118242d29b92e1b08ef84e67e4a5ed06e0a80be20e6a32bfed6b"
 dependencies = [
- "log",
+ "log 0.4.8",
  "mac",
- "markup5ever",
+ "markup5ever 0.10.0",
  "proc-macro2",
  "quote",
  "syn",
 ]
 
+[[package]]
+name = "html5ever-atoms"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e4a291981feff7291514f8219d5cd2c740d0c042d75cff248a7c00a025f9d40"
+dependencies = [
+ "string_cache 0.5.2",
+ "string_cache_codegen 0.4.4",
+]
+
 [[package]]
 name = "http"
 version = "0.1.21"
@@ -445,8 +627,8 @@ dependencies = [
  "futures-io-preview",
  "futures-util-preview",
  "http",
- "lazy_static",
- "log",
+ "lazy_static 1.4.0",
+ "log 0.4.8",
  "slab",
  "sluice",
 ]
@@ -483,7 +665,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1beeffc5ae5ab0def2cb85e26063a8e6b4f579b0adec3805bf87472086948956"
 dependencies = [
  "cssparser",
- "html5ever",
+ "html5ever 0.25.1",
  "matches",
  "selectors",
 ]
@@ -494,9 +676,15 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c54d9f465d530a752e6ebdc217e081a7a614b48cb200f6f0aee21ba6bc9aabb"
 dependencies = [
- "log",
+ "log 0.4.8",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76f033c7ad61445c5b347c7382dd1237847eb1bce590fe50365dcb33d546be73"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -531,6 +719,15 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "log"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
+dependencies = [
+ "log 0.4.8",
+]
+
 [[package]]
 name = "log"
 version = "0.4.8"
@@ -546,20 +743,37 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 
+[[package]]
+name = "markup5ever"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65381d9d47506b8592b97c4efd936afcf673b09b059f2bef39c7211ee78b9d03"
+dependencies = [
+ "log 0.4.8",
+ "phf 0.7.24",
+ "phf_codegen 0.7.24",
+ "serde 1.0.106",
+ "serde_derive",
+ "serde_json",
+ "string_cache 0.7.5",
+ "string_cache_codegen 0.4.4",
+ "tendril",
+]
+
 [[package]]
 name = "markup5ever"
 version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aae38d669396ca9b707bfc3db254bc382ddb94f57cc5c235f34623a669a01dab"
 dependencies = [
- "log",
- "phf",
- "phf_codegen",
- "serde",
+ "log 0.4.8",
+ "phf 0.8.0",
+ "phf_codegen 0.8.0",
+ "serde 1.0.106",
  "serde_derive",
  "serde_json",
- "string_cache",
- "string_cache_codegen",
+ "string_cache 0.8.0",
+ "string_cache_codegen 0.5.1",
  "tendril",
 ]
 
@@ -593,7 +807,7 @@ version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4fc2c02a7e374099d4ee95a193111f72d2110197fe200272371758f6c3643d8"
 dependencies = [
- "autocfg",
+ "autocfg 1.0.0",
 ]
 
 [[package]]
@@ -612,6 +826,15 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "miniz_oxide"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa679ff6578b1cddee93d7e82e263b94a575e0bfced07284eb0c037c1d2416a5"
+dependencies = [
+ "adler32",
+]
+
 [[package]]
 name = "mio"
 version = "0.6.21"
@@ -624,7 +847,7 @@ dependencies = [
  "iovec",
  "kernel32-sys",
  "libc",
- "log",
+ "log 0.4.8",
  "miow",
  "net2",
  "slab",
@@ -654,6 +877,16 @@ dependencies = [
  "ws2_32-sys",
 ]
 
+[[package]]
+name = "mustache"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51956ef1c5d20a1384524d91e616fb44dfc7d8f249bf696d49c97dd3289ecab5"
+dependencies = [
+ "log 0.3.9",
+ "serde 1.0.106",
+]
+
 [[package]]
 name = "net2"
 version = "0.2.33"
@@ -677,6 +910,25 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 
+[[package]]
+name = "num-integer"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
+dependencies = [
+ "autocfg 1.0.0",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
+dependencies = [
+ "autocfg 1.0.0",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.13.0"
@@ -705,7 +957,7 @@ version = "0.9.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7717097d810a0f2e2323f9e5d11e71608355e24828410b55b9d4f18aa5f9a5d8"
 dependencies = [
- "autocfg",
+ "autocfg 1.0.0",
  "cc",
  "libc",
  "pkg-config",
@@ -717,6 +969,7 @@ name = "paperoni"
 version = "0.1.0"
 dependencies = [
  "async-std",
+ "epub-builder",
  "kuchiki",
  "md5",
  "surf",
@@ -729,6 +982,15 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
+[[package]]
+name = "phf"
+version = "0.7.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3da44b85f8e8dfaec21adae67f95d93244b2ecf6ad2a692320598dcc8e6dd18"
+dependencies = [
+ "phf_shared 0.7.24",
+]
+
 [[package]]
 name = "phf"
 version = "0.8.0"
@@ -736,18 +998,38 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3dfb61232e34fcb633f43d12c58f83c1df82962dcdfa565a4e866ffc17dafe12"
 dependencies = [
  "phf_macros",
- "phf_shared",
+ "phf_shared 0.8.0",
  "proc-macro-hack",
 ]
 
+[[package]]
+name = "phf_codegen"
+version = "0.7.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b03e85129e324ad4166b06b2c7491ae27fe3ec353af72e72cd1654c7225d517e"
+dependencies = [
+ "phf_generator 0.7.24",
+ "phf_shared 0.7.24",
+]
+
 [[package]]
 name = "phf_codegen"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cbffee61585b0411840d3ece935cce9cb6321f01c45477d30066498cd5e1a815"
 dependencies = [
- "phf_generator",
- "phf_shared",
+ "phf_generator 0.8.0",
+ "phf_shared 0.8.0",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.7.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09364cc93c159b8b06b1f4dd8a4398984503483891b0c26b867cf431fb132662"
+dependencies = [
+ "phf_shared 0.7.24",
+ "rand 0.6.5",
 ]
 
 [[package]]
@@ -756,8 +1038,8 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17367f0cc86f2d25802b2c26ee58a7b23faeccf78a396094c13dced0d0182526"
 dependencies = [
- "phf_shared",
- "rand",
+ "phf_shared 0.8.0",
+ "rand 0.7.3",
 ]
 
 [[package]]
@@ -766,21 +1048,30 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f6fde18ff429ffc8fe78e2bf7f8b7a5a5a6e2a8b58bc5a9ac69198bbda9189c"
 dependencies = [
- "phf_generator",
- "phf_shared",
+ "phf_generator 0.8.0",
+ "phf_shared 0.8.0",
  "proc-macro-hack",
  "proc-macro2",
  "quote",
  "syn",
 ]
 
+[[package]]
+name = "phf_shared"
+version = "0.7.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "234f71a15de2288bcb7e3b6515828d22af7ec8598ee6d24c3b526fa0a80b67a0"
+dependencies = [
+ "siphasher 0.2.3",
+]
+
 [[package]]
 name = "phf_shared"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c00cf8b9eafe68dde5e9eaa2cef8ee84a9336a47d566ec55ca16589633b65af7"
 dependencies = [
- "siphasher",
+ "siphasher 0.3.3",
 ]
 
 [[package]]
@@ -801,6 +1092,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
 
+[[package]]
+name = "podio"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "780fb4b6698bbf9cf2444ea5d22411cef2953f0824b98f33cf454ec5615645bd"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.6"
@@ -837,6 +1134,38 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
+dependencies = [
+ "fuchsia-cprng",
+ "libc",
+ "rand_core 0.3.1",
+ "rdrand",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rand"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
+dependencies = [
+ "autocfg 0.1.7",
+ "libc",
+ "rand_chacha 0.1.1",
+ "rand_core 0.4.2",
+ "rand_hc 0.1.0",
+ "rand_isaac",
+ "rand_jitter",
+ "rand_os",
+ "rand_pcg 0.1.2",
+ "rand_xorshift",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "rand"
 version = "0.7.3"
@@ -845,10 +1174,20 @@ checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
 dependencies = [
  "getrandom",
  "libc",
- "rand_chacha",
- "rand_core",
- "rand_hc",
- "rand_pcg",
+ "rand_chacha 0.2.2",
+ "rand_core 0.5.1",
+ "rand_hc 0.2.0",
+ "rand_pcg 0.2.1",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"
+dependencies = [
+ "autocfg 0.1.7",
+ "rand_core 0.3.1",
 ]
 
 [[package]]
@@ -858,9 +1197,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.5.1",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+dependencies = [
+ "rand_core 0.4.2",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
+
 [[package]]
 name = "rand_core"
 version = "0.5.1"
@@ -870,13 +1224,66 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "rand_hc"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
+]
+
+[[package]]
+name = "rand_isaac"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
+[[package]]
+name = "rand_jitter"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
+dependencies = [
+ "libc",
+ "rand_core 0.4.2",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rand_os"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
+dependencies = [
+ "cloudabi",
+ "fuchsia-cprng",
+ "libc",
+ "rand_core 0.4.2",
+ "rdrand",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rand_pcg"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
+dependencies = [
+ "autocfg 0.1.7",
+ "rand_core 0.4.2",
 ]
 
 [[package]]
@@ -885,7 +1292,25 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "16abd0c1b639e9eb4d7c50c0b8100b0d0f849be2349829c740fe8e6eb4816429"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
+]
+
+[[package]]
+name = "rand_xorshift"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
+[[package]]
+name = "rdrand"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
+dependencies = [
+ "rand_core 0.3.1",
 ]
 
 [[package]]
@@ -894,6 +1319,39 @@ version = "0.1.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 
+[[package]]
+name = "regex"
+version = "1.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6020f034922e3194c711b82a627453881bc4682166cabb07134a10c26ba7692"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fe5bd57d1d7414c6b5ed48563a2c855d995ff777729dcd91c369ec7fea395ae"
+
+[[package]]
+name = "remove_dir_all"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
+dependencies = [
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
+
 [[package]]
 name = "ryu"
 version = "1.0.4"
@@ -906,7 +1364,7 @@ version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "039c25b130bd8c1321ee2d7de7fde2659fa9c2744e4bb29711cfc852ea53cd19"
 dependencies = [
- "lazy_static",
+ "lazy_static 1.4.0",
  "winapi 0.3.8",
 ]
 
@@ -926,16 +1384,22 @@ dependencies = [
  "cssparser",
  "derive_more",
  "fxhash",
- "log",
+ "log 0.4.8",
  "matches",
- "phf",
- "phf_codegen",
+ "phf 0.8.0",
+ "phf_codegen 0.8.0",
  "precomputed-hash",
  "servo_arc",
  "smallvec",
  "thin-slice",
 ]
 
+[[package]]
+name = "serde"
+version = "0.9.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34b623917345a631dc9608d5194cc206b3fe6c3554cd1c75b937e55e285254af"
+
 [[package]]
 name = "serde"
 version = "1.0.106"
@@ -961,7 +1425,7 @@ checksum = "a7894c8ed05b7a3a279aeb79025fdec1d3158080b75b98a08faf2806bb799edd"
 dependencies = [
  "itoa",
  "ryu",
- "serde",
+ "serde 1.0.106",
 ]
 
 [[package]]
@@ -972,7 +1436,7 @@ checksum = "9ec5d77e2d4c73717816afac02670d5c4f534ea95ed430442cad02e7a6e32c97"
 dependencies = [
  "dtoa",
  "itoa",
- "serde",
+ "serde 1.0.106",
  "url",
 ]
 
@@ -986,6 +1450,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "siphasher"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b8de496cf83d4ed58b6be86c3a275b8602f6ffe98d3024a869e124147a9a3ac"
+
 [[package]]
 name = "siphasher"
 version = "0.3.3"
@@ -1033,17 +1503,60 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 
+[[package]]
+name = "string_cache"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c8ba7515dd502b75080d989b819d31fb72686a82320d8006f665003c42ef79"
+dependencies = [
+ "debug_unreachable",
+ "lazy_static 0.2.11",
+ "phf_shared 0.7.24",
+ "precomputed-hash",
+ "serde 0.9.15",
+ "string_cache_codegen 0.4.4",
+ "string_cache_shared",
+]
+
+[[package]]
+name = "string_cache"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89c058a82f9fd69b1becf8c274f412281038877c553182f1d02eb027045a2d67"
+dependencies = [
+ "lazy_static 1.4.0",
+ "new_debug_unreachable",
+ "phf_shared 0.7.24",
+ "precomputed-hash",
+ "serde 1.0.106",
+ "string_cache_codegen 0.4.4",
+ "string_cache_shared",
+]
+
 [[package]]
 name = "string_cache"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2940c75beb4e3bf3a494cef919a747a2cb81e52571e212bfbd185074add7208a"
 dependencies = [
- "lazy_static",
+ "lazy_static 1.4.0",
  "new_debug_unreachable",
- "phf_shared",
+ "phf_shared 0.8.0",
  "precomputed-hash",
- "serde",
+ "serde 1.0.106",
+]
+
+[[package]]
+name = "string_cache_codegen"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0f45ed1b65bf9a4bf2f7b7dc59212d1926e9eaf00fa998988e420fd124467c6"
+dependencies = [
+ "phf_generator 0.7.24",
+ "phf_shared 0.7.24",
+ "proc-macro2",
+ "quote",
+ "string_cache_shared",
 ]
 
 [[package]]
@@ -1052,12 +1565,18 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f24c8e5e19d22a726626f1a5e16fe15b132dcf21d10177fa5a45ce7962996b97"
 dependencies = [
- "phf_generator",
- "phf_shared",
+ "phf_generator 0.8.0",
+ "phf_shared 0.8.0",
  "proc-macro2",
  "quote",
 ]
 
+[[package]]
+name = "string_cache_shared"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1884d1bc09741d466d9b14e6d37ac89d6909cbcac41dd9ae982d4d063bbedfc"
+
 [[package]]
 name = "surf"
 version = "1.0.3"
@@ -1068,10 +1587,10 @@ dependencies = [
  "http",
  "isahc",
  "js-sys",
- "log",
+ "log 0.4.8",
  "mime",
  "mime_guess",
- "serde",
+ "serde 1.0.106",
  "serde_json",
  "serde_urlencoded",
  "url",
@@ -1091,6 +1610,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "tempdir"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
+dependencies = [
+ "rand 0.4.6",
+ "remove_dir_all",
+]
+
 [[package]]
 name = "tendril"
 version = "0.4.1"
@@ -1108,6 +1637,25 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eaa81235c7058867fa8c0e7314f33dcce9c215f535d1913822a2b3f5e289f3c"
 
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
+dependencies = [
+ "lazy_static 1.4.0",
+]
+
+[[package]]
+name = "time"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
+dependencies = [
+ "libc",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "tokio-io"
 version = "0.1.13"
@@ -1116,7 +1664,7 @@ checksum = "57fc868aae093479e3131e3d165c93b1c7474109d13c90ec0dda2a1bbfff0674"
 dependencies = [
  "bytes",
  "futures",
- "log",
+ "log 0.4.8",
 ]
 
 [[package]]
@@ -1146,12 +1694,27 @@ dependencies = [
  "smallvec",
 ]
 
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 
+[[package]]
+name = "unreachable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f2ae5ddb18e1c92664717616dd9549dde73f539f01bd7b77c2edb2446bdff91"
+dependencies = [
+ "void",
+]
+
 [[package]]
 name = "url"
 version = "2.1.1"
@@ -1169,6 +1732,15 @@ version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05e42f7c18b8f902290b009cde6d651262f956c98bc51bca4cd1d511c9cd85c7"
 
+[[package]]
+name = "uuid"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fde2f6a4bea1d6e007c4ad38c6839fa71cbb63b6dbf5b595aa38dc9b1093c11"
+dependencies = [
+ "rand 0.7.3",
+]
+
 [[package]]
 name = "vcpkg"
 version = "0.2.8"
@@ -1181,6 +1753,12 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
 
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
@@ -1204,8 +1782,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b75d4f3f9b81dfc7d66b955876b325b20e8affd4ce8d93e51162626fc5faadb"
 dependencies = [
  "bumpalo",
- "lazy_static",
- "log",
+ "lazy_static 1.4.0",
+ "log 0.4.8",
  "proc-macro2",
  "quote",
  "syn",
@@ -1223,7 +1801,7 @@ dependencies = [
  "futures-channel-preview",
  "futures-util-preview",
  "js-sys",
- "lazy_static",
+ "lazy_static 1.4.0",
  "wasm-bindgen",
  "web-sys",
 ]
@@ -1310,3 +1888,16 @@ dependencies = [
  "winapi 0.2.8",
  "winapi-build",
 ]
+
+[[package]]
+name = "zip"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6df134e83b8f0f8153a094c7b0fd79dfebe437f1d76e7715afa18ed95ebe2fd7"
+dependencies = [
+ "bzip2",
+ "crc32fast",
+ "flate2",
+ "podio",
+ "time",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 1228e69..867a34a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,7 @@ license = "MIT"
 
 [dependencies]
 async-std = "1.5.0"
+epub-builder = "0.4.5"
 kuchiki = "0.8.0"
 md5 = "0.7.0"
 surf = "1.0.3"
diff --git a/src/main.rs b/src/main.rs
index 60c95a3..af5b718 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 use std::fs::File;
 
 use async_std::task;
+use epub_builder::{EpubBuilder, EpubContent, ZipLibrary};
 use url::Url;
 
 mod extractor;
@@ -24,14 +25,22 @@ fn main() {
             .download_images(&Url::parse(urls[5]).unwrap())
             .await
             .expect("Unable to download images");
-        let mut out_file = File::create("out.html").unwrap();
+        let mut out_file = File::create("out.epub").unwrap();
+        let mut html_buf = Vec::new();
         extractor
             .content
             .unwrap()
             .as_node()
-            .serialize(&mut out_file)
+            .serialize(&mut html_buf)
             .expect("Unable to serialize");
-    });
+        let html_buf = std::str::from_utf8(&html_buf).unwrap();
+        EpubBuilder::new(ZipLibrary::new().unwrap())
+            .unwrap()
+            .add_content(EpubContent::new("code.xhtml", html_buf.as_bytes()))
+            .unwrap()
+            .generate(&mut out_file)
+            .unwrap();
+    })
 }
 
 async fn fetch_url(url: &str) -> String {