This is one of the best Oracle books I've read for the last 2-3 years. It combines the importance of the subject with the depth and clarity of presentation technique. For instance, Ch.5 can serve not only as XML with PL/SQL but also as a great source of the PL/SQL scripts and approaches. The author deserves very high marks for the job he's done. I wish I had more books like this.Vad Roytman,Oracle DBA