• 100 Questions & Answers About Colorectal Cancer
  by David S. Bub, MD et al. Jones & Bartlett, 2003.
• 100 Questions & Answers About Pancreatic Cancer
  by Eileen O'Reilly, MD and Joanne Frankel Kelvin, RN, MSN. Jones and Bartlett Publishers, 2003.
• 100 Questions & Answers About Liver Cancer
  by Ghassan K. Abou-Alfa.  Jones & Bartlett, 2005.
• Cancer of the Lower Gastrointestinal Tract
  by Christopher Willett, MD. American Cancer Society, 2001.
• Colon & Rectal Cancer
  by Lorraine Johnston. O'Reilly, 2000.
• Colon & Rectal Cancer
  by Paul Ruggieri, MD. Addicus Books, 2001.
• Dr. Sanjiv Chopra's Liver Book: A Comprehensive Guide to Diagnosis, Treatment, and Recovery
  by Sanjiv Chopra, MD Simon & Schuster Fireside, 2001.
• Pancreatic Cancer
  by John L. Cameron, MD, American Cancer Society, 2001.
• What Your Doctor May Not Tell You about Colorectal Cancer
  by Mark Pochain, MD. Warner Books, 2004.

Anal Cancer

• Anal Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Anal Cancer.
• United Ostomy Association 
• Connect With Others

Carcinoid Cancer

• Caring for Carcinoid Foundation
• Carcinoid Cancer Foundation, Inc 
• Connect With Others

Colorectal Cancer

• Colon Cancer Alliance
• Colorectal Cancer: Detailed Guide – This is a section of the American Cancer Society Website that provides information on colorectal cancer.
• Colorectal Cancer Network
• United Ostomy Association 
• Connect With Others

Esophageal Cancer

• Cathy's EC Café
• Esophageal Cancer: Detailed Guide - This is a section of the American Cancer Society website that provides information on esophageal cancer.
• Connect With Others

Gallbladder Cancer

• Gallbladder Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Gallbladder Cancer.
• Connect With Others

Liver & Bile Duct Cancer

• American Liver Foundation
• Bile Duct Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Bile Duct Cancer.
• Liver Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Liver Cancer.
• Livertumor.org
• Connect With Others

Pancreatic Cancer

• The Lustgarten Foundation for Pancreatic Cancer Research
• The National Pancreas Foundation
• Pancreatic Cancer Action Network (PANCAN)
• Pancreatic Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Pancreatic Cancer.
• Pancreatica.org
• Connect With Others

Small Intestine Cancer

• Small Intestine Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Small Intestine Cancer.
• There are no websites we have found on small intestine cancer at this time. See Small Bowel External Websites
• United Ostomy Association 
• Connect With Others

Stomach (Gastric) Cancer

• Stomach Cancer: Detailed Guide - This is a section of the American Cancer Society Website that provides information on Gastric Cancer.
• Connect With Others

General Websites

• American Cancer Society
• Cancer Care
• National Cancer Institute
• People Living With Cancer - an ASCO website

• National Cancer Institute - Cancer Dictionary