How much… that book? It’s free. It is under OpenSource License. That is under GPL, while that other is under CC License. Great, it’s fantastic. Have you some links? Of course. Here is my best free-books list.
- Mercurial, The Definitive Guide
- The Django Book
- Dive Into Python 3
- Practical PHP Programming
- Zend Framework: Surviving The Deep End
Have you got any similar link to free and best quality resource?