In no particular order:<p>The Art of Computer Programming, by Knuth<p>Compilers: Principles, Techniques, and Tools by Aho, Sethi, and Ullman (the dragon book)<p>Structure & Interpretation of Computer Programs, by Abelson and Sussman<p>On Lisp, by Graham<p>A First Course in Database Systems, by Ullman and Widom<p>The C Programming Language, by Kernighan and Ritchie<p>The Cathedral and the Bazaar, by Raymond