While not exactly a book, I think this is definitely worth putting in this category. Dev.Mag is an online game development magazine. It’s based in South Africa and launched in 2005. All issues can be downloaded for free on the website; free subscription by email is also available.

The magazine covers a wide range of topics, ranging from programming, tool reviews, game design, graphics, game reviews, interviews and much more. It is clearly focused on amateur and independent developers.
Currently, there are also three different series of articles in the magazine. First of all, there’s “Back of a napkin”, wich explains the basics of 3D rendering. Second, there’s a series about mobile game development in Java. And finally, there’s a series of tutorials about Blender 3D, an incredibly powerful and free 3D modeling tool.
New issues are published every month; the latest one is issue 14. A must read for every game developer!

Dev.Mag homepage