- The classic "Samson Wright's Applied Physiology, Thirteenth Edition". It's very broad, but a strong base is always nice : https://www.amazon.com/Wrights-Physiology-Thirteenth-Medicin...

- How not to die. A good balanced between scientific references and averge joe explanations: https://www.amazon.com/How-Not-Die-Discover-Scientifically/d...

- The China Study. Live study on millions of people to correlate quality of food and health instead of just quantity : https://en.wikipedia.org/wiki/The_China_Study)

- "Constitution des organismes animaux et végétaux Causes des maladies qui les atteignent" is a fantastic complement but I don't know if it exists in english. Careful though, it has a controversial point of view on vaccines. Still worth it: https://www.amazon.fr/Constitution-organismes-bact%C3%A9rien...