This vividly illustrated book recounts how in just over a century physicians have advanced from a mere glimpse of the portals of the alimentary tract to its deepest recesses and how simple visual diagnosis has progressed to the application of the most sophisticated diagnostic and therapeutic techniques. Most importantly, the book eloquently defines how light has brought truth to the elucidation of the furthermost reaches of the human body. The 144-page, hard-bound book was published in 2000 and was authored by Irvin M. Modlin, MD, PhD.