Rating: 

I've generally had good experiences with O'Reilly books so I felt confident that my high expectations of this book would be met. Unfortunately I found the author brushes over a lot of content which leaves many unanswered questions in the reader's mind. This book seems to be a draft more than a finished product. I would definitely take a look at a second edition of this book; what has been written was written well and hopefully a second edition will pad out the content and explanations a bit more.