Hello, Though O-Reilly book is a difficult book to understand but having said that if you go slowly and gradually, this is the only book which I think is complete for preparing scbcd5.0. and then refer Mikalai Zaikin pdf's. For persistence API you can refer Pro EJB 3.0.
Thanks for suggesting book by manning publication. Can you send SCBCD Exam Study Kit (310 - 090).pdf link or send it on my mail id firstname.lastname@example.org I have just started with scbcd 5 and it has no dedicated book..(thats scary)