Listmania!
Dragging your code into the 21st Century
Domain-driven Design: Tackling Complexity in the Heart of SoftwareDomain-driven Design: Tackling Complexity in the Heart of Software by Eric Evans
Buy new: £18.99 / Used from: £12.85
Hugely useful in thinking about the real problems you face
Working Effectively with Legacy Code (Robert C Martin)Working Effectively with Legacy Code (Robert C Martin) by Michael Feathers
Buy new: £17.96 / Used from: £16.00
Revelatory if you've been working with a tired old ball of spaghetti for years
Effective Java: Second EditionEffective Java: Second Edition by Joshua Bloch
Buy new: £17.99 / Used from: £16.99
Old habits die hard: make sure your old habits are good ones
Java Puzzlers: Traps, Pitfalls, and Corner CasesJava Puzzlers: Traps, Pitfalls, and Corner Cases by Joshua Bloch
Buy new: £14.48 / Used from: £9.00
Not going to fix your codebase, but some light relief might be handy
Programming Ruby: The Pragmatic Programmer's Guide, Second EditionProgramming Ruby: The Pragmatic Programmer's Guide, Second Edition by Dave Thomas
Buy new: £20.61 / Used from: £4.97
Go and do something completely different. When you're done, you see a host of solutions (and problems) you never had before...
The Cathedral & the BazaarThe Cathedral & the Bazaar by Eric Raymond
Buy new: £7.15 / Used from: £3.95
If the code's broken, maybe some bigger things are too. Think about the broadest context for your problems and fixes...
Enterprise SOA Adoption StrategiesEnterprise SOA Adoption Strategies by Steve, Jones
Buy new: £19.13 / Used from: £20.99
Solid thinking on broad aspects of architecture
Head First Design PatternsHead First Design Patterns by Eric Freeman
Buy new: £19.82 / Used from: £17.00
You need to bring the rest of the team with you too... patterns can give you acceleration through shared language
Head First Object-Oriented Analysis and Design: A Brain Friendly Guide to OOA&DHead First Object-Oriented Analysis and Design: A Brain Friendly Guide to OOA&D by Brett McLaughlin
Buy new: £22.02 / Used from: £21.49
... and some people find OOAD a challenge, so help them out.
Spring in ActionSpring in Action by Craig Walls
Buy new: £21.23 / Used from: £21.21
Now look at how you implement, and what you can use to get there quicker
J2EE Development Without EJB, Expert One-on-OneJ2EE Development Without EJB, Expert One-on-One by Rod Johnson
Buy new: £15.73 / Used from: £5.40
Just make sure you've got the basic principles too.
Pro Spring: From Professional to Expert (Expert's Voice in Java)Pro Spring: From Professional to Expert (Expert's Voice in Java) by Rob; Machacek, Jan Harrop
Buy new: £31.49 / Used from: £4.55
And borrow some of Rob's enthusiasm before tackling your managers!