The original author and editor Zdenek Mařatka having passed away, Jerome D. Waye, president of the World Endoscopy Organisation WEO took over to continue and update together with J. R. Armengol Miró this basic reference for digestive endoscopists. This book is vastly updated with new pictures and definitions of gastrointestinal diseases. New sections of ERCP and EUS round out the entire hollow GI tract while both surgeons and gastroenterologists will benefit from the chapters on diagnostic and therapeutic laparoscopy. A sampling of the best photos of the GI tract along with the side by side meticulous line drawings by Prof. Mařatka are delightful and supplemented by modern high definition video images. This book is meant to supplement the MST as described in the web pages of the World Endoscopy Organization.