| I'm trying to build the ultimate collection of hacker bibles. These include books on programming languages, algorithms, mathematics, theory, engineering principles and methodologies, design, paradigms, operating systems, frameworks, industry commentary, business/startup-related, etc. Below are my favorites (in no particular order), what other "greats" am I missing? The Art of Computer Programming (three volumes + fascicles) - Knuth (aka TAOCP) Structure and Interpretation of Computer Programs - Abelson and Sussman (aka SICP, aka The Wizard Book) Introduction to Algorithms - Cormen, Leiserson, Rivest, Stein (aka CLRS) Design Patterns - Gamma, Helm, Johnson, Vlissides The C Programming Language - Kernighan, Ritchie The C++ Programming Language - Stroustrup The Scheme Programming Language - Dybvig Practical Common LISP - Seibel Programming Perl - Wall, Christiansen and Orwant ANSI Common Lisp - Graham Refactoring - Fowler UML Distilled - Fowler Introduction to the Theory of Computation - Sisper Information Theory, Inference, and Learning Algorithms - MacKay Modern Operating Systems - Tanenbaum On Lisp - Graham Hackers & Painters - Graham Paradigms of Artificial Intelligence - Norvig Pattern Recognition and Machine Learning - Bishop The Java Language Specification - Gosling, Joy, Steele Learning Python - Lutz & Ascher Programming Erlang - Armstrong Programming Ruby - Thomas, Fowler, Hunt Calculus - Spivak How to Solve It - Polya The Design and Implementation of the 4.4 FreeBSD Operating System - McKusick, Bostic, Karels, Quarterman The Design of the Unix Operating System - Bach The Unix Programming Environment - Kernighan, Pike The Art of Unix Programming - Raymond Godel, Escher, Bach - Hofstadter Metamagical Themas - Hofstadter Joel on Software - Spolsky Code Complete - McConneli The Mythical Man-Month - Brooks No Silver Bullet - Brooks The Long Tail - Anderson The Art of the Start - Kawasaki | 
Understanding the Linux Kernel is surprisingly thorough not just in its coverage of the Linux kernel, but also architecture and OS design in general
The Design and Implementation of FBSD book now covers 5.3, which is much less dated than the 4.4 text.
Artificial Intelligence: A Modern Approach is one of my favorite CS books and covers AI topics with surprising clarity.
The Design of Everyday Things
Linkers & Loaders, I'd hesitate to call this a bible of any sort, but it's a rarely-referenced gem that covers a topic few others do and it's relevant to me, at least.
Probably others I'm missing. This is a very good list though.