Instruct: Classify the given review as either positive or negative.
Query: Decent book, but you must understand its purpose first

This book is for only a few type of repairs and for a few type of dishwashers. It will only help with the most basic repairs. (Replacing a dishrack for one example) Also, if you have a dishwasher with the electronic (digital) timer, forget this book, it won't help at all. Furthermore, there is a chance that your type of dishwasher will not be mentioned (at all) in this book; mine was not. I had a problem with a drain flapper and this book did not help at all with this problem. In fact, my brand of dishwasher had a diagram of the pump/motor assembly in the book but it did not match at all with my actual assembly.