Standard Ebooks and its contributors release the contents of this repository under the CC0 1.0 Universal Public Domain Dedication, with the exception of the contents of the build-manual.py file, which are released under the GPLv3 license.
You can read the GPLv3 license here: http://www.gnu.org/licenses/gpl-3.0.html
You can read the CC0 1.0 Universal Public Domain Dedication here: https://creativecommons.org/publicdomain/zero/1.0/