Sigh, the canonical reference on 3D graphics "in software" has been the Foley and Van Dam tome "Computer Graphics: Principles and Practice in C" [1], followed closely by "Principles of Interactive Computer Graphics" [2] by Newman and Sproul. Followed closely by the Graphics Gems series, and then Watt's eponymous "3D Computer Graphics" [3] and "Real Time Rendering" [4] by Moller and Haines.

All wonderful texts and can tell you everything you want to know about doing 3D graphics in software. They won't help at all (generally) for GPU based graphics sadly.

[1] http://www.amazon.com/Computer-Graphics-Principles-Practice-...

[2] http://www.amazon.com/Principles-Interactive-Computer-Graphi...

[3] http://www.amazon.com/Computer-Graphics-3rd-Alan-Watt/dp/020...

[4] http://www.amazon.com/Real-Time-Rendering-Third-Tomas-Akenin...