Rice University is releasing under a Creative Commons license college level textbooks written by professional textbook writers. The texts have passed through a peer review process as well for vetting and fact checking.
This is a free ebook about using the debugger/hex editor Radare2. It teaches basic techniques for using Radare2 all the way up to reverse engineering 64-bit executables. Free to download.
A utility for turning fanfic from online archives into ebooks to load into a tablet, phone, or reader. Written in python. Consists of a plugin for Calibre, a CLI utility, and a webservice.
A free handbook for journalists that describes how to verify and vet information from socialmedia sources. Written by journalists from the BBC, Storyful, ABC, Digital First Media, and other news organizations. Free to download as a PDF, ePub, or kindle ebook. Available in English, Greek, French, Portuguese, Spanish, Arabic, Russian, Turkish, Coatian, and Italian.