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.
TheServerSide distributes a free ebook (pdf) titled "Mastering EJB, 2nd edition", which is relatively good. O'Reilly also has a good book titled "Enterprise JavaBeans, 3rd edition" that you should consider.