Michael Abrash's Black Book is a very enjoyable read. The material is oriented towards a much lower level than people are working with today, but there's some great information in there. I feel that it does a good job of teaching one how to think about approaching a problem; not just DOS graphics techniques
The Black Book is a classic. Obviously, much of the material is dated, but Abrash is a great writer. IIRC, there's some tidbits in there about Carmack's approach to getting BSP into Quake...or maybe that was Masters of Doom.
