Like the other commenter said, game engines are a huge topic. The game engine architecture book has a nice overview (even though it's hefty), you would probably want an equal size book on each aspect of a game engine; graphics, networking, dynamics, audio, ai, etc. I haven't read it, but also heard good things about the real time rendering book. I did look at the game engine architecture book looking for info about deferred rendering and it was fairly shallow (but thats not the goal of the book). If I remember correctly--the book actually points you to more detailed resources (papers) and books.