Rogerio,
We recommended having basic knowledge of Hibernate Core or
Java Persistence but some reviewers have read the book with no knowledge of Hibernate and some with knowledge of the .Net platform, and found the book useful.
We tried to make the book an easy read. We included a lot of information to explain not only the 'how' but also the 'why'. We believe there is something in t for everyone.
Hope this helps.
John G