Gross Pathology of Avian Diseases: Text and Atlas is a new book published by the American Association of Avian pathologists (AAAP). The sections in the book are organized by diseases, which are grouped by etiology. Each section consists of text and pictures of gross lesions. The majority of pictures have been taken in situ to show how the lesions appear at necropsy. Although gross lesions are emphasized, etiology, clinical signs and, if applicable, pathogenesis of the disease process and transmission of infectious agent are included. Over 1200 high quality figures show the gross pathology of over 120 avian diseases. The overwhelming majority of pictures come from diagnostic cases that the authors have seen during their careers as avian pathologists. Several figures are included for some diseases to show gross lesions in organs and tissues that vary in distribution, extent, and severity. Anyone involved in the diagnosis of avian diseases will benefit from this book.