Donald E. Greydanus 
Chronic Disease and Disability: The Pediatric Gastrointestinal Tract, Second Edition. Overview with Perspectives of History, Nutrition and Behavioral Pediatrics [PDF ebook] 

This book celebrates the emergence of knowledge in this field and is written for primary care clinicians to help update knowledge of pediatric gastroenterology (GI). The current and future shortage of pediatric gastroenterologists necessitates steady, rejuvenated information on GI disorders for primary care clinicians as they care for childern and adolescents with complex gastroenterologic dilemmas and disorders. In view of this shortage and the rapidly increasing knowledge in pediatric GI, as well as understanding indications for referral to pediatric gastroenterologists in the 21st century, au courant assiduous information aimed at primary care clinicians in these areas becomes increasingly important, and we hope this book will fill the void.