Book excerpt: This textbook explores the history, biology, and treatment of acid related diseases, including gastric and duodenal ulcer disease, gastroesophageal reflux disease (GERD), and the role of H. pylori. The text offers thorough coverage of the subject matter, with an in-depth historical and biological focus. Equal focus is given to the biology and pharmacology of acid secretion and to the specific disease states of ulcers and GERD. This edition is full of new full-color medical illustrations of all aspects of this topic.