Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A must have reference guide for all mechanics.

This is an EXCELLENT reference guide on how to do all sorts of quality maintenance practices. Yes it pertains to aircraft, but these sound practices apply to anything worth maintainig. There is a proper way to do things and this is the guide that shows you.This book is spiral bound which is real convenient since it lies flat so you can have the book open and work at the same time. All maintenance books should consider this type of binding.It lost one star based on print quality (the font could have been darker) but most would have no complaint in this area.