I would like to recommend two excellent books:
Beginning Java EE 6 Platform with GlassFish 3 From Novice to Professional by Antonio Goncalves, Apress
Pro JPA 2 Mastering the Java Persistence API by Mike Keith and Merrick Schincariol, Apress.
SCJP 5, SCWCD 5, SCBCD 5
If you have a bad day in October, have a slice of banana cream pie. And this tiny ad:
RavenDB is an Open Source NoSQL Database that’s fully transactional (ACID) across your database