Rating: 

However, giving this book a rating was challenging. I found the book very informative and helpful, but it was all based on the old 1.0 API. I guess that is what happens when you write about a cutting edge technology! :-)

Overall I though it was a 4 - Very Good, but the 1.0 API dropped it down to a 3 - Good.

Can't wait to see the next edition.