Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I have no idea how this book made it on the shelf

This is definately the WORST book I have ever read. The authors constantly repeat material. The whole of the book is only about 40 pages, repeated over and over and over. In several instances, they even used the same EXACT text, they just cut-and-pasted to make the book look bigger. The book contradicts it self so many times I gave up after only 249 of the 788 pages. This book was obviously written by people who know nothing about XML. It reminds me of those papers I wrote in school when you had to stretch a 1/2 page paper into a 5 page essay. To be fair to the authors though I have read reviews on the other XML books in Amazon, and it looks like they are pretty much all below-standard quality. I have no idea who would put a 5 star rating on a book like this.