A broad and quite basic overview. Easy and quick read, slightly entertaining and well researched - but not mind blowing. Those who are more than a little interested in health or general biology are unlikely to learn anything new here. It barely touches the surface on most topics. A few things are taken out of context... which I suppose is to be expected when the approach is so basic and mostly based on trivia. A good primer for adults who may have never taken biology and/or are new to health awareness.