Bernie Tobisch began his career as a technician for Singer. So what he doesnt know about sewing machines probably isnt worth knowing. This is an essential guide to have in your sewing room, as it takes you through everything you need to know about looking after your machine and more importantly getting to know what it is capable of and how it works.When I first started sewing, I remember I threw out a perfectly working, less than a year old sewing machine because I moved the tension wheel and didnt know what to do to restore the setting!The Troubleshooting Guide is fabulous, it is detailed and I think even if there was no more than this guide in the book it is money well spent.