As stated by the other readers, this is a great book. Extremely well designed and edited. The division of the book into two section (concepts and details) made it a true pleasure to read. While the Oracle Press books are pretty good, I went with O'Reilly on the DBA topic because I just didn't want to get burdened 1200 + pages of pedantic garbage (ever notice how no Oracle books are ever weigh less than 10 pounds?). In sum, I don't regret the purchase. And while it's a lot lighter than my other Oracle books, I consider it my most valuable reference.