Instruct: Classify the given Amazon review as either positive or negative.
Query: Concept of the book is GREAT, however. It does not deliver.

I bought this book on the sole purpose of the concept it wasdriving. I was literally excited when I first started readingthe material, only to drift further away from the previous, afew pages in. Basically, I became more and more frustrated as Icontinued reading. Why? Well just check the other reviews aboutthis book. You have about 30% who are saying it's a great bookand 70% stating that the book is filled with errors and missingfiles. I just wonder where the 30% came from and if theyactually purchased and tried to use this book.I'll put it to you like this. If you want to use this book as a... paper weight, or stylish mouse pad from the get go, go rightahead and buy the book. Don't say you weren't forewarned.New Riders', seriously needs to put a recall on this book.