It is rightly concerned the effects of electromagnetic fields on our health and that of our children. The book helps to understand electromagnetism from a scientific point of view, but provides no answer as to the dangers (or not) waves. Instead, read the latest report from the ANSES (October 2013) about it, if you have the courage (461 pages). ANSES it considers that the available scientific data do not show of "proven effect" of waves on health, while recognizing that they can cause biological changes in the body (sleep, fertility, cardiovascular system).
An interesting point: this book evokes the phenomenon of "constructive" interference corresponding to the addition of the surrounding air at a given point of the habitat. The "subtractive" interference correspond to the opposite effect. Then it begs the question of the effects of the interference + or - in a building with 10aine wifi antennas, or ... in a classroom with 20-30 tablets using wifi, or in business ... with the generalization of wifi for all.