I'm a grown man and this book was written for what I imagine would be the "tween" age group, so I have no right to complain. Moreover, I picked it up for virtually nothing at a hobby store's going-out-of-business sale, which gives me even less right to complain. Still, I was hoping my dumb butt could learn something from it. Yet such was not the case. I think that if I were a 12-year-old boy who had the slightest bit of interest in the topic of electricity and magnetism I would have found myself scratching my head, scrunching up my face and saying, "Yeah, but..." every few minutes as I read it, i.e. it presents just the basic facts yet doesn't do much of anything to explain them (an example would be when the book tried to explain how magnets worked by saying that they were composed of smaller magnets, which I think even a kid would recognize as being a completely useless explanation).
But it's a pretty package -- full of colorful illustrations -- and written in a fun and friendly way, so I applaud it for its efforts. Hopefully it can encourage a child to follow up an interest in the subject with more extensive investigation.