Read the book here: book.mixu.net/css/
Writing a patch should be easy: edit the markdown files under ./input/ and file a pull request; I'll handle the rest.
I didn't include the commits from prior to the release, because writing is a messy and painful process of revisions, deletions and rethinking things.
Taking a look at the commit history, I think I spent about five months on this piece of long form writing (~40 commits since January 2015), which is a lot less than typical.
The content of the book is in ./input/. To generate the book:
npm install
make build
which generates the output in ./output/.
This book is available for free, but what I've written remains mine.
Translations: as long as the result made is available for free (you can have ads) I welcome translations.
Other use: contact me; as long as your intentions are good I'd be happy to figure out something. I'm not looking to make money from the book but I don't want it to be republished without my permission.
Some icons by Yusuke Kamiyamane. Licensed under a Creative Commons Attribution 3.0 License.
Git Logo by Jason Long is licensed under the Creative Commons Attribution 3.0 Unported License.