This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
That's a pretty general question. Just for starters, have you had a look at the reviews over at the bunkhouse yet? Do you have any preferences for a certain style? Are you looking for beginner or advanced books? Are you preparing for a certification exam?