Initially I started with EJB 3.1 (http://oreilly.com/catalog/9780596158033) book. Since straight away the author explained the concepts, I felt it would be great to give some time to start the basics. For that I have started with Head First EJB book and I am going thro it.
Once I gone thro both the books, I am planning to read the EJB 3.1 spec
Am i on the right track... Is there anything I am missing