Talk to any dev for long enough, and the subject of books will come up. I love books. I love them because they give rooms a comfortable warmth. They smell good, and there's often a satisfyingly substantial feel to them. What's undeniable though, is the astronomical amount I've learnt from books. From juggling to writing a quick sort in Assembler.
I think we've all got a list of must-reads, and this is mine (note that these are Amazon affiliate links).
Peopleware: Productive Projects & Teams (2nd Edition)
Microsoft Solutions Framework Essentials
One Strategy: Organization, Planning, and Decision Making
The Art of War
Designing Solutions for Your Business Problems: A Structured Process for Managers and Consultants
The 7 Habits of Highly Effective People
How to Win Friends and Influence People
Influence: The Psychology of Persuasion
The Story Factor: Inspiration, Influence and Persuasion Through the Art of Storytelling
Security Engineering: A Guide to Building Dependable Distributed Systems