After seeing Jeremy’s list I figured I would put up the books that have influenced me. This is by far a partial list but ...

First programming book I owned: Mastering Turbo Assembler, Tom Swan

OO

Gang of Four

POSA 1-5 (note 4 & 5 are recently out)

Domain Driven Design, Evans

P of EAA, Refactoring, Fowler

OOAD, Booch

Object Design Designing Object-Oriented Software, Wirfs-Brock (I agree with Jeremy these are some of the most under-rated books out there)

AI type stuff

Foundations of Genetic Programming, Langdon

GP 2 GP 3, Koza

Agile Stuff

The Six Sigma Handbook, what’s the point in becoming agile if you can’t measure the benefit?

Extreme Programming Explained, Beck

Lean Software Development, Poppendieck

Lean Thinking, Womack yeah this is kind of weird here but read it!

Thinking

How To Solve It, Poyla

And Suddenly the Inventor Appeared Innovation Algorithm, Altshuller  

Other

TAOCP belongs on every software engineer’s desk, as does Sedgewick

Code Complete, McConnell

Writing Secure Code, Howard

The Pragmatic Programmer, Hunt

The Pi-Calculus The Pi-Calculus You will start hearing this more and more.

Purely Functional Data Structures MUST HAVE

The Little Lisper This book is just beautiful in its simplicity (check out the whole series)

The Zen of Code Optimization, Abrash