As a young reporter on the weekly Life, Sean Callahan met the then-retired Margaret Bourke-White, which led to a collaboration on The Photographs of Margaret Bourke-White, published in 1972, shortly after her death, by New York Graphic Society. (The story of that collaboration was published in the September/October 1998 issue of American PHOTO magazine.)

He went on to create the award-winning American Photographer magazine, which he edited for ten years before moving into new media, first as managing editor of Time Life Digital, and currently as Vice President, Executive Producer of Time Warner Cable's high-speed online information service, Road Runner. Over the years he has continued his interest in photography as an editor or author of ten books on the medium.

Between the time he is running to the Road Runner deployments of Time Warner Cable systems from Maine to Hawaii, he resides in Alton, New Hampshire, with his wife Betsy and raises obscure alpine garden plants and dwarf conifers.