Rating:  - The best book covering EJB
I worked on project oriented to web. We used EJB and from the start we based our source of knowledge on this book. It has everything you need to know in order to program EJBs.
The project was about one year ago, and im still reading the book once and again and it doesnt stop to amaze me. Everything i find something new to be applied to my work.
I you need to learn EJBs , this is the book for you. Seriously.
Rating: - A great way to get started
If you want to learn about Enterprise JavaBeans, this book is a great place to start. The author begins by explaining the basic concepts around Enterprise JavaBeans such as distributed objects, business objects, components transaction monitors, and asynchronous messages. He does in such a way that developers from a variety of backgrounds can relate to the concepts (e.g. a mainframe programmer relating to CICS as transaction monitor).
The first three chapters builds on these fundamental concepts to create an understanding of the architecture and the attraction of Enterprise JavaBeans. The idea that you can develop these server-side components and expect them to work in any EJB-compliant Component Transaction Monitor is a great incentive to dig deeper. By chapter four, the author is creating components. They don't do much, but they are enhanced and new ones created throughout the rest of the book. The remainder of the book covers Container Managed Persistence, Bean Managed Persistence, Session Beans, Message-Driven Beans (new in EJB 2.0), Transactions, Design Strategies, Deployment Descriptors, and J2EE. Where the EJB 1.1 spec differs from EJB 2.0, the book shows explains how to manage each one.
This book expects the reader to have solid knowledge of Java and enterprise level development. The examples in the book are not always the full code listing. There are example workbooks that can be downloaded from the book website. While the applications are portable, the way that they are managed differs. I suggest that you have your preferred EJB server working before beginning the book and work along with the examples. Additionally, there are numerous diagrams to assist you in grasping the concepts. If you need to do EJBs, get this book.
Rating: - An Exclellent Choice
This book is an excellent overview to creating JAVA Enterprise Beans. It has tons of usefull code to study. Make sure you have an excellent understanding of JAVA before buying this book. It does an excellent job of describing all the components of the deployment descriptor. It clearly distinguishes between an entity, a session, and a message driven bean. Also be familiar with JDBC and distributed computing. Finally, know RMI inside and out.
Rating: - This book is the Bible for Enterprise JavaBeans
This is an outstanding EJB book that all J2EE developers should own. It is truly the "Bible" for Enterprise JavaBeans. Mr. Monson-Haefel does a fantastic job on explaining and illustrating the concepts behind EJB 2.0. I've enjoyed the CMP (EJB 2.0) chapter and also the EJB QL topic. As a special bonus, I was happy to download the JBoss 3.0 work book written by JBoss Gurus: Bill Burke & Sacha Labourey. It had great exercises that complement Monson-Haefel's book and made me really get some "hands on exercises" with EJB 2.0. It also reinforce key concepts that can be learn by doing. To Richard Monson-Haefel, Bill Burke and Sacha Labourey, a big "Thank you" for a job well done. You dudes did a marvelous job.
Rating:  - very theoretical... needs more complex ejb-ql coverage
This book would be a good one for developers new to EJB. This book is very theoretical, if you are well versed with EJB 1.1 and bought this book with the vision of catching up on EJB 2.0, you'd be dissatisfied with the depth of coverage on the new features, you would also quickly realize that the coverage for any facet of the EJB architecture is for the rookies.
This is certainly not a technical reference book, I came upon this looking for the ejb-ql syntax for nested 'SELECT' statements, though this book has devoted many pages to ejb-ql, it covers only simple queries.
This book does not at all get into the differences in implementation in different EJB containers, so if the examples/syntaxes don't work, don't be surprised.
All in all, this is a good book for beginners, to get yourself out of the problems you are facing in your EJB project, you need a more specific and technical book for that particular platform. For WebLogic, I'll strongly suggest BEA WebLogic Server Bible by Joe Zuffoletto et. al.
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