I read this book and Couchman's Oracle 8 DBA Certification Guide (from Oracle Press). The Exam Cram book did a great job covering the bases needed for the Oracle networking exam. It is very concise and to the point. If you ignore the number of silly typos, the book attacked the topics very well from examination point of view. I think it was a very poor proofreading effort!I gave a 5 star because the topics are laid out well and details are to the point.