This is a brilliant book on classic car electrics that just misses out on a 5 star rating. There is so much useful information in this book that it is unreal. The book is well written, easy to understand and unlike other classic car electrical books, this book gives a far greater understanding on how to read electrical diagrams. Most chapters have hypothetical diagrams accompanying their individual chapter! Even overdrive units are given a separate chapter. Unfortunately testing with multimeters is not really covered, so you will need to look eleswhere if this bothers you. Having said that if car electrics leaves you all confused, this book will help you gain a greater understanding on how they work.