I am working on restoring several vintage vehicles, and I read this book with a highlighter in-hand. It's been very rewarding for this novice auto electrician. Auto electric is explained from fundemental theory to basic wiring concepts to testing procedures to full wiring diagrams to in-depth, specific diagnosis. The extensive use of diagrams and color photos help explain the concepts and procedures being discussed. Detailed suggestions on tool brands and models are given, as well as step-by-step procedures for testing and repair.I, for one, highly recommend this for anyone struggling to understand or repair vehicle electric issues.