I read this book because I recently received bad news at the dentist's office about my own teeth. Mr. Nagel claims, and backs up his claims with a lot of scientific evidence, that modern dentistry does not truly help teeth, but that changing one's diet in specific ways can stop the decay and can even reverse the decay. His dietary recommendations are very similar to those of the Nourishing Traditions cookbook and the Weston A. Price Foundation, but even more restrictive.
I would recommend this book to anyone looking to promote their dental health without following the methods of modern dentistry.