In this book Daniel goes through the evolution of the human body, followed by talking about mismatch diseases and effects of sugar, fat, salt and low activity on human body, which I found quite educating read. It highlights mismatches between our environment of evolutionary adaptation and our modern post industrialised world distilling the information in an easily absorbable way.
You will find out such things for example such as how body converts sugar into energy, energy consumption by hunter gatherers versus modern human, brain size relative to primates and what being not active does to our body.
The book covers quite a lot of stuff. In human evolution part he talks about Apes and Humans and our common ancestors, on how we became bipedals, following by culture and rise of farming which caused our population to explode which exposed us to all sorts of diseases.
By reading this book you will learn more about human evolution, on how environment and history made us who we are today. You will also learn more about the way your body works, health, diet and what can cause certain mismatch diseases. The book is eye opener and I would highly recommend it to read it through.