Let me make this clear - I liked the contents.
But having said that, I was extremely disappointed at what seems
like a "rush" editing job.
There are just too many typo's and in some cases, contradicting
technical information in the book. Especially in the Q&A sections after any chapter where it seems that the answers say something contrary to what was explained in the chapter.
Also, its a frustrating exercise to constantly look up Oracle's
documentation just to confirm whether the data dictionary view names/ column names/ package names (and concepts) in the book are correct!! Not something you would want to spend time on
while studying for a technical exam.