pandoc -f FROM -t TO -o OUTPUT INPUT

FIN=<inputfile>
# convert md to HTML
pandoc -f markdown -t html -o ${FIN%.*}.html ${FIN}
# convert md to HTML
# markdown_github is available but the output is weird
pandoc -f markdown -t textile -o ${FIN%.*}.textile ${FIN}
# generate standalone HTML and save as PDF
pandoc -f gfm -t html5 -s ${FIN} -o ${FIN%.*}.pdf

Converting Website

http-agents#wget

# use `ebook-convert` from Calibre to convert static site to ebook
cd website-dir-with-index-html
ebook-convert index.html book.mobi
ebook-convert index.html book.azw3
ebook-convert index.html book.fb2
ebook-convert index.html book.epub

Converting Gitbook

gitbook

Download the source, use these commands:

# Generate a PDF file
# print to 'a5' or 'a6'
$ gitbook pdf ./ ./mybook.pdf

# Generate an ePub file
$ gitbook epub ./ ./mybook.epub

# Generate a Mobi file
$ gitbook mobi ./ ./mybook.mobi

eBook and PDF · GitBook Toolchain Documentation
PDF Configuration · GitBook Toolchain Documentation

Converting Ansible docs

Ansible docs are generated with Sphinx, which natively supports ePub as output.

Make epub of documentation available · Issue #7205 · ansible/ansible

git clone -b master --single-branch https://github.com/ansible/ansible.git
# optionally checkout a stable branch
cd ansible/docsite
sed -i s/\'html\'/\'epub\'/ build-site.py
make docs
# ePub available at `docsite/htmlout/AnsibleDocumentation.epub`

Converting Docker docs

Docker docs are generated with MkDocs.

git clone -b master --single-branch https://github.com/docker/docker.git
make docs

Converting Rust docs

killercup's killercup/trpl-ebook project converts Rust docs to HTML (hence eBook) with pandoc. OBSOLETE!
The upstream code have some issue in headings so patch is needed when generating ebook.

rust#Books

Save as HTML with some hacks:
https://github.com/rust-lang/rust/issues/20866#issuecomment-495962961

git clone -b master --single-branch https://github.com/abcdev/trpl-ebook/tree/restructure
# https://github.com/killercup/trpl-ebook/pull/52

Converting Redux docs

paulkogel/redux-offline-docs: Redux documentation in PDF, ePub and MOBI formats for offline reading.

git clone -b master --single-branch https://github.com/reactjs/redux.git
gitbook install
gitbook mobi . docs/redux-documentation.mobi

Converting ELK docs

elastic/docs

elastic/elasticsearch-definitive-guide: The Definitive Guide to Elasticsearch uses Asciidoctor

docker run -it -v --rm ./elasticsearch-definitive-guide:/documents/ -w /documents asciidoctor/docker-asciidoctor
# in container
asciidoctor -v -r asciidoctor-pdf -d book -b pdf -a toc book.asciidoc
asciidoctor -v -r asciidoctor-epub3 -d book -b epub3 -a toc book.asciidoc

ebook-convert book.epub book.azw3

Converting Hugo docs

git clone -b release-docs --single-branch git@github.com:spf13/hugo.git
cd hugo
hugo

Converting ZSH docs

curl http://zsh.sourceforge.net/Doc/zsh_html.tar.gz | tar zx
cd zsh_html; ebook-convert index.html ../zshdoc.azw3

curl http://zsh.sourceforge.net/Guide/zshguide_html.tar.gz | tar zx
cd zshguide_html; ebook-convert zshguide.html ../zshguide.azw3

Writing/Publishing

Digital Publishing 101 for Ebooks | Course Home | Digital Publishing 101
Notjohn's Self-Publishing Guide

Portals

MobileRead Forums
Good e-Reader - e-book and e-reader News
Kindle 人社区-Kindle 人都爱的 Kindle 论坛
 Kindle 高登悅讀專頁

天火藏書排版系統 ( Kindle/NOOK/iPad 電子書 EPUB MOBI PDF 中文直書直排轉檔系統 )

BookAuthority: The Best Business Books Recommended By Experts

Resources

public-domain-books

5 Sites With Lots of Completely Free Ebooks That Don't Suck
侃侃而谈篇六十：免费的 iPad 和 Kindle 电子书资源合集电子书刊什么值得买

广场 - 看云 China's Gitbook
无忧书城 - 为您免费提供在线阅读服务
 Jiumo Search 鸠摩搜索 - 文档搜索引擎 baidu search
苦瓜书盘
 明朝那些事儿-明朝那些事儿全集在线阅读

Leanpub: Publish Early, Publish Often try adding /read to url
allinurl:https://leanpub.com read - Google Search
About this Collection | World Digital Library | Digital Collections | Library of Congress
smusali/Leanpub-Hack: I used some web scraping and web automation techniques within Python to legally download free books from www.leanpub.com

Free ebooks by Project Gutenberg - Gutenberg
Wikisource, the free library
Wikibooks
Public Domain | Feedbooks
Free Books : Download & Streaming : eBooks and Texts : Internet Archive
Open Book Project
Welcome to Open Library | Open Library
Sharing Knowledge and Building Communities - OpenStax CNX
800 Free eBooks for iPad, Kindle & Other Devices | Open Culture
Free Ebook Foundation promotes access and preservation of knowledge, literature, and culture.
Free eBooks For Your Kindle or Other eReader | ManyBooks

IT/programming
The Linux Documentation Project
书栈网 · BookStack_程序员 IT 互联网开源编程书籍免费阅读与下载，取之于猿用之于猿！
GitBook · Writing made easy
Free Information Technology Research Library of White Papers, Magazines, Reports, and eBooks
anarcho-copy
anarcho-copy Directory Tree

Grey sources
安娜的档案
 ScanLibs - Ebooks & Elearning For Programming
Share And Download IT Ebook
Free Professional and Technical Research Library of White Papers, Magazines, Reports, and eBooks
Digitale Bibliothek Erkenntnisse finden und austauschen. - DOKUMEN.PUB
FREE FILE DOWNLOADS DIGTVBG LINUX BOOK TUTORIALS INFORMATION - Hacking

ISBN.Directory - Book Search Engine - Price Comparison

Comics

kindle 知道漫画补档专区
 Kindle 漫画 mobi 漫画推送下载 - pixvol.com
Kindle 漫画 Kindle 人社区
 漫画_在线漫画 - 动漫屋:你的我的在线漫画
 布卡漫画
 nn64 的漫畫列表 - nn64 Comic List

Corporates

Ebooks | Resources | Syncfusion
Resources / White Papers | InfoWorld
Codeship eBooks
eBooks Series: The Docker and Container Ecosystem - The New Stack
Wiley Online Library | Scientific research articles, journals, books, and reference works
O'Reilly Open Books Project

Paid

多看阅读(duokan.com) - 海量畅销电子书免费试读，数百万读者阅读首选
 首頁-銅板漫畫出版署-淘寶網
 A Book Apart, Brief books for people who make websites.
Readmoo 讀墨電子書 ─ 台灣最大繁體中文 EPUB 電子書服務
 HyRead ebook 電子書店 on HKPL

香港公共圖書館 - 電子書