Half of the book focuses on the primal diet of eating whole and natural foods with no carbs. The author discusses at length the primal diet developed by Dr Cordain, with a number of statistics.
However, nutrition is a very complex subject and is very personal specific especially if you have any medical issues, psychological problems and also depends on your genetic and physiology.
The author is not an experienced nutritionist and doesn't present all the data against a primal diet (or studies comparing more traditional healthy balanced eating habits) making it misleading. Let alone eating that quantity of meat isn't environmentally sustainable, the author doesn't seem to give two hoots about animal welfare neither.
The book also fails to mention eating meats with vegetables all the time is not only expensive, but also very boring and will sap you out of life!
Why then do the Japanese have one of the highest life expectancy with a staple diet of rice, cooked and pickled vegetables, fish and meat? Looks like a balanced diet to me.
The section on sleeping well, exercise, breathing and feeling good by doing good was ok, stuff you should know but don't do. Worrying the author advocates not wearing sunscreen with a few pages of explanation, again it is misleading. Regular high doses of sun does cause skin cancer. Actually the number one place to get skin cancer is scalp, face and nose, which is where you get most sun exposure.
Overall a fluffy book that has not been peer reviewed, that seems to offer bias and fake news.