Maybe these would be helfpul too:
(1) [i]Java EE 5 Development using GlassFish Application Server[/i] (very helpful as a starter book)
(2) [i]Beginning EJB 3 Application Development[/i] and [i]Pro EJB 3 Java Persistence API[/i]
all of these have examples using transaction management, entities and JPA.
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