Pathology of the Gastrointestinal Tract (ISBN 068318007X)

pathology of the gastrointestinal tract:
it's excellent textbook of GI pathology, for pathologists, and even gastroenterologists, endoscopists.

Barrett esophagus:
The section on Barrett esophagus is the best among several GI pathology books that I have read. The authors' guidance on how to report pathological findings clearly indicate their familiarity with clinical management.