This book is intended for non-medical professionals, and thusdoes not explain things in much detail or depth. However, it explainsenough for the people who are interested in health and human physiology. One of the strength of this book is that the author tries to explain how things work in human body. This isn't just the atlas like other atlas books where authors simply list lots of terminologies of the parts with the figures (only with few explanations). Especially, I liked the way the author explains about how hormone system works. One might wonder the quality of the pictures (or the book overall) would be any good considering the price of this book, and I can say that this is a quality book. This book is published in 1999, so I guess that at least it has the most updated information regarding human body. I can hardly think of any other book that can surpass the quality/price ration that this book offers. There is another book that is complementary to this book: Atlas of the Human Body, by Takeo Takahashi. Some pictures are better in Takahashi's book (actually, many figures are better). But this book is more expensive and published in 1995. If you need only one "Know Your Body" will be the one to choose, because it has more explanations of "why/how". In my case, I bought both. Note that these books may not be intended for medical professionals, they are detailed enough to get you bored unless you are really interested in human body, health, and physiology. So, be prepared. It is like a text book reading.