Engine Performance Diagnostics by ScannerDanner

Very useful tool that should be on top of everybody's box professional or not.

I've been following Paul on YouTube for many a years. Offers excellent professional level advice and guidance. The book is a very useful tool and for the price you cannot beat it, wish I purchased a long time ago.

This book is well-written and thoughtfully organized, using language that’s easy for both current and future tech enthusiasts to understand.

This book is not only educational but will continue to be useful for reference in my diagnostic troubles. So many underlying fundamentals in this thing, to study that will expand your knowledge. It covers pretty much everything.