I have recently started learning jpa, ejb but still can't get the all pieces organized, so I decided to start developing a ejb project on eclipse but cannot find any tutorial or book to have an overview on how things work, if there is any suggestion it will be highly appreciated
thanks a lot
For an overview Oracle provides the online JavaEE tutorial. Enterprise Javabeans 3.1 by O'Reilly publishing is a very good book. For JPA specifically you may want to look into Pro JPA 2.0.
And it is no wonder you can't get it organized - its a large and complex subject that requires understanding far beyond code; so big you can't capture it all in one book. Many people already fail to learn just what the Java Enterprise Edition is precisely.