
This is what I have on my list so far:
The C Programming Language
C Interfaces and Implementations: Techniques for Creating Reusable Software
Expert C Programming
Algorithms in C, Parts 1-5 (Bundle): Fundamentals, Data Structures, Sorting, Searching, and Graph Algorithms
Structure and Interpretation of Computer Programs
Introduction to Algorithms
Compilers: Principles, Techniques, and Tools
Hacker's Delight
Cracking the Coding Interview: 150 Programming Questions and Solutions
Advanced Programming in the UNIX Environment