this is the program

Wanting to spend my electrician CAP (that's 15 years since I stopped studying after my master computer) I bought this book because resuming the program.
The explanations are basic formulas are "balanced" without giving any explanation necessary for their understanding.
If I'd had this book with a level of high school I'd taken me for a fool, and would have been disgusted to learn.
Put images and snowmen that is not enough to make a didactic book.
To understand the power I took a book "fashioned" without unnecessary drawings and gives real explanation.