Slashdot have a good review on the excellent book, Hibernate in Action, written by Gavin King and Christian Bauer.
The review is similar to my own impressions – the book is an excellent read and is well thought out, covering background information and useful examples that make the bok easy to read and follow.
This is probably the best technical book I’ve read (ie meaning actually read from cover to cover, rather than just used as reference material) for a long time. All too often technical books are a regurgitation of the API, or are just too dull to be actually ready as a book.
This book is definitely a recommended purchase for anyone already working with or considering working with Hibernate.