Eat Dirt by Dr. Josh Axe
This book is well written, well organized, and has surveys to help you detect your pathway to better health.
The underlying concept of Eat Dirt is that our immune systems are compromised due to our life styles of eating processed foods and living toxic lives. Essentially, we have sanitized ourselves into illness.
Getting back to nature, using natural products, eliminating antibiotics and eating whole foods is the basis for everyone, yet there are different gut profiles calling for different healing prescriptions.
The healing protocols include altering our diets, taking supportive supplements, and making changes in our lives such as; having attitudes of gratitude, watching funny movies or scheduling relaxation time.
There is a website, http://www.draxe.com, for a more in depth survey to detect your gut type as well as further recommendations and more information.