The Penis Book is an unflinching, comprehensive guide to all things penis-related, from sexually transmitted infections to the science of blood flow. Author Aaron Spitz, MD served as assistant clinical professor at UC Irvine's Department of Urology for 15 years and is a regularly featured guest on The Doctors.

The Penis Book features an easy-to-follow, five-step plan for optimum penis health, including plant-based eating recommendations, information on penis-healthy foods, and suggested exercises for penis well-being.

Useful to folks of all genders, The Penis Book is a one-stop-shop for the care and maintenance of the penis in your life.