Computer Graphics: Principles and Practice, $30 (CS248)

http://www.amazon.com/Computer-Graphics-Principles-Practice-Programming/dp/0201848406/

Contextual Design: A Customer-Centered Approach to Systems Design, $40

http://www.amazon.com/Contextual-Design-Customer-Centered-Interactive-Technologies/dp/1558604111/

Bringing Design to Software, $5

http://www.amazon.com/Bringing-Design-Software-ACM-Press/dp/0201854910/

Reading in Human-Computer Interaction, Towards the Year 2000, Free

http://www.amazon.com/Readings-Human-Computer-Interaction-Interactive-Technologies/dp/1558602461/

Human-Computer Interaction, Dix, 2nd edition, Free

http://www.amazon.com/Readings-Human-Computer-Interaction-Interactive-Technologies/dp/1558602461/

Ivor Horton's Beginning C++, Free

http://www.amazon.com/Ivor-Hortons-Beginning-Complete-Compliant/dp/186100012X/

Unix System V: Practical Guide, Free

http://www.amazon.com/UNIX-System-V-Practical-Guide/dp/080537566X/