National gambling addiction hotlines:

National Council on Problem Gambling: 1-800-522-4700
Gamblers Anonymous: 1-888-424-3577

Online support:

Gamblers Anonymous: www.gamblersanonymous.org
Gam-Anon: www.gam-anon.org
National Council on Problem Gambling: www.ncpgambling.org
Women Helping Women: www.femalegamblers.info

Books:

Sojourner, Mary. She Bets Her Life

Anonymous. A Day at a Time: A Book of Daily Meditations for the Compulsive Gambler

Davis, Diane Rae. Taking Back Your Life

Gamblers Anonymous. Sharing Recovery Through Gamblers Anonymous (a.k.a. The Blue Book)

(above resources taken from Sojourner, Mary. She Bets Her Life).