I asked subscribers to the Orange County Java User’s Group (OCJUG) mailing list what books had the greatest impact on them as a developer. Below are their answers, in the order submitted (so the first two are mine). Images are linked to the book’s Amazon.com entry.

Thanks to all who contributed.

Peopleware : Productive Projects and Teams, 2nd Ed. by Tom Demarco, Timothy Lister	The Pragmatic Programmer: From Journeyman to Master by Andrew Hunt, David Thomas
Design Patterns: Elements of Reusable Object-Oriented Software By Erich Gamma, Richard Helm, Ralph Johnson, John M. Vlissides	JUnit Recipes : Practical Methods for Programmer Testing by J. B. Rainsberger
Domain-Driven Design: Tackling Complexity in the Heart of Software by Eric Evans	Effective Java Programming Language Guide by Joshua Bloch Note: An update for Java 1.5 is due later this year.
Refactoring: Improving the Design of Existing Code by Martin Fowler, Kent Beck, John Brant, William Opdyke, Don Roberts	Agile Software Development, Principles, Patterns, and Practices by Robert C. Martin
Patterns of Enterprise Application Architecture by Martin Fowler	Code Complete, Second Edition by Steve McConnell
The Psychology of Computer Programming: Silver Anniversary Edition by Gerald M. Weinberg	Facts and Fallacies of Software Engineering by Robert L. Glass
The Inmates Are Running the Asylum : Why High Tech Products Drive Us Crazy and How to Restore the Sanity (2nd Edition) by Alan Cooper	Core J2EE Patterns: Best Practices and Design Strategies, Second Edition by Deepak Alur, Dan Malks, John Crupi
Head First Java, 2nd Edition by Kathy Sierra, Bert Bates	Java Programming Language, The (4th Edition) by Ken Arnold, James Gosling, David Holmes
Thinking in Java (4th Edition) by Bruce Eckel Note: There is a free electronic version of the 3rd edition at mindview.net.	Test Driven Development: By Example by Kent Beck