This book is almost great. In every chapter, the author covers really, really important stuff, and just when he gets to the point where you expect him to explain how to use the feature or include details on the feature, the section ends and begins a new. If you need a good introduction to what is new in 9i, by all means buy this book. If you are familiar with the new features, and need more info about each feature - well, you might have the best luck with Oracle Documentation (as dry as it is). I think the Oracle community is still waiting for a 9i book that is a true masterpiece.