Great book. I recommend buying a paper/ebook version to support the author. His writing style is very concise and funny so it's easy to follow and it reads very fast. The only thing I didn't like is that for code examples he uses C++ with unnecessary classes where vanilla C functions would've been sufficient, but I understand his reasoning for doing so ("It is the lingua franca of the industry").

Does anyone have any recommendations for other books about game engine design?