IPT's Electrical Handbook
But if you have a nagging feeling that there might still be a few things you could learn, then buy this book! What we have here is a course in electricity, taught by a retired Master Electrician, and it's small enough to fit in your shirt pocket. This is one of those little gems that you can read from cover to cover (which will give you a solid, plain-English education in electricity and electrical system components), and then refer back to for years to come because this is also one of the best reference tools I've ever seen. Mr. Putz didn't leave a thing out, and the drawings are SO easy to follow. No toolbox should be without this book. What a great value for the money!