Instruct: Classify the given Amazon review as either positive or negative.
Query: Excellence

I have one word to sum up my review of this book: "Wow!" Danny Goodman once again delivers an excellent masterpiece. The organization and systematic approach to everything you could possibly want to know about JavaScript is absolutely beautiful. Not only is this book a totally breath-taking reference, but it is also absolutely marvelous to read cover-to-cover. I found myself with more knowledge than I could ever imagine gaining from a book. And hey, we all seem to forget things when we've read a book as long as this. Solution: the index. This book's index points you to exactly where you need to be. All in all, if I had to pick the most excellent JavaScript book I had ever read--and believe me I have read many!--it would have to be this one!