Another book about EJB 3.0 is Mastering Enterprise JavaBeans 3.0. The book focuses on the changes made since EJB 2.1. Here are some week aspects of this book:
- it is not that smoothly readable as the previous EJB book
- the book spends too much on high-level introduction of EJB 3.0 specification while it could dive into more practical details ASAP
- JPA is poorly covered
But nevertheless, the book is somewhat a good complementary material for learning EJB 3.0.