It was an interesting book about how the body uses electricity in all sorts of different ways, the most obvious being the control of the motor functions. Some of the biology was way over my head, but the other parts were quite straightforward to understand. There were a couple of glaring errors, but these were on the electrical side, and the sub title of the book about it being about the human body is not strictly accurate as she covers all sorts of life, from plants to animals and how they use electricity.