Reader's Digest is a monthly general-interest family magazine co-founded in 1922 by Lila Bell Wallace and DeWitt Wallace, and based in Chappaqua, New York, United States of America. The Audit Bureau of Circulation says Reader's Digest is the best-selling consumer magazine in the USA, with a circulation of over 5.5 million copies in the United States, and a readership of 38 million as measured by Mediamark Research (MRI).