the Enterprise javabeans 3.1 from O'Reilly. EJB3.1 Oreilly
Then i readed
the EJB 3.1 Spec EJB Spec
the Ivan's notes Ivan Notes
And at the end I made a lot of time the Enthuware Mock. Enthuware Mock exam
My Opinion is that the Enterprise Javabeans 3.1 Book is a good book but is not for a certification. It cover a lot of think in the certification but not in a certification mode.
The Specs are hard to read but very usefull for the exam.
The Ivan's notes are very usefull. I have integrated with my comments and my notes just has a ref book.
But again what is tremendously useful is the Enthuware mock exam.
This is my path for this cert.
I Hope can help You.