I have been a backyard mechanic for about 10 years. The last 3 years, I have gotten much more serious by expnading my knowledge, tools, supplies and work load. During all this expansion, I promised myself I would learn electronics and really start getting serious with the subject. Every method I tried to learn electronics, I just couldnt grasp the advanced (useful) concepts. I tried several online courses, on the job training, other electrical manuals, pretty much everything. I found this book at my local library and it seemed like it would cover everything I wanted to learn. Within three days, I had everything I wanted to know practically memorized. The fourth day I spent about $100 in tools and supplies so I could practice what I learned. I have read this book front to back and already fixed several problems in my car and home. I just cant say enough good about this book. Not only is it well written and easy to understand, the topics go in order and have excellent pictures to match. I will return the library book and get one for myself. The only thing I can say negatively about this book is that the publish date is about 15 years old. Not much has changed since then, especially the basic concepts the book teaches. Overall, If you need to learn how to understand, troubleshoot, overhaul, or replace anything electronic that is automotive based; this book is for you!