“This book is designed to increase the understanding of the complex relationship between the gut flora, the nervous system, and the immune system, a topic that is often poorly understood and underappreciated in clinical medicine. … book is intended for practicing clinicians in the fields of gastroenterology, neurology, and immunology, written by authors who are experts in their fields. … a useful contribution to the field, as many books aiming to cover a wealth of information lack these specific topics.” (Nicole E. Pisapia, Doody's Book Reviews, March, 2017)