Im Lifehacker-Blogpost «Top 10 Ways to Teach Yourself to Code» werden unter Punkt 4 freie Programmier-Bücher-Sammlungen erwähnt (via Stephen’s Lighthouse):
«4. Grab Some Free Programming Books
When you get stuck on a problem or just need to look something up, reference books come in very handy. There’s a huge collection of over 500 free programming books posted on GitHub, and another collection of Ebooks covering 24 programming languages.»