With so many great recommendations…
I felt it was right to share it with the world. Here are some of the books that people in the Java Posse Roundup 2010 recommended you to read (quickly).

Agile Books

• Lean software development an Agile Toolkit by  Mary and Tom Poppendieck.
• Succeeding with Agile by Mike Cohn.
• User Stories Applied: For Agile Software Development by Mike Cohn
• Agile Estimating and Planning by Mike Cohn
• Practices of an Agile Developer by Andy Hunt
• Agile Retrospectives; Making Good Teams Great by Esther Derby and Diana Larsen
• Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin

Testing Books

• xUnit Test Patterns by Gerard Meszaros
• Growing Object-Oriented Software Guided By Tests by Steve Freeman and Nat Pryce

Complex Event Processing

• The Power of Events: An Introduction to Complex Event Processing in Distributed Enterprise Systems by David C. Luckham

Version Control

• Pro Git, by Scott Chacon
• Version Control with Git: Powerful Tools and Techniques for Collaborative Software Development by Jon Loeliger
• Pragmatic Version Control Using Git, by Travis Swicegood

Career Books

• Career 2.0 by Jared Richardson.
• Passionate Programmer by Chad Fowler.
• Getting Things Done: The Art of Stress-Free Productivity by David Allen
• The Myth of Multitasking: How “Doing It All” Gets Nothing Done by Dave Crenshaw
• The Power of a Positive No: Save The Deal Save The Relationship and Still Say No by William Ury
• What Should I Do with My Life?: The True Story of People Who Answered the Ultimate Question by Po Bronson

Business

• Peopleware by Tom DeMarco.
• Small Giants by Bo Birlingham.
• Nudge by Richard H. Thaler.
• Drive, by Daniel H. Pink.
• Snakes in Suits: When Psychopaths Go to Work by Paul Babiak and Robert D. Hare
• Rework by Jason Fried and David Heinemeier Hansson
• The Management Myth: Why the Experts Keep Getting it Wrong by Matthew Stewart
• Freakonomics: A Rogue Economist Explores the Hidden Side of Everything (P.S.) by Steven D. Levitt and Stephen J. Dubner
• Free: The Future of a Radical Price by Chris Anderson (BTW, you can get a free version in iTune for the audio version)
• In Search of Stupidity by Merrill R. (Rick) Chapman

Software Projects and Their Teams, Groups, Processes and People

• Adrenalin Junkies and Template Zombies: Understanding Patterns of Project Behaviour by Tom DeMarco, Peter Hruschka, Tim Lister, Suzanne Robertson

Release It! writing and maintaining software from an operations perspective

On Intelligence by Jeff Hawkins – How a new understanding of the brain will lead to the creation of truly intelligent machines