Grosvenor developed an interest in photography at an early age. When was 11, a photograph he took at the Seattle World's Fair was published in the September, 1962 issue of National Geographic. Grosvenor subsequently worked as a freelance photographer, completing 23 assignments for the magazine and its book division in such countries as Belize, France, Iceland, Spain, Tonga, and Turkey. On several assignments, he was the photographer for articles written by his father on sailing in Canada, Saint Pierre and Miquelon, and the Aegean and Ionian Islands in Greece, which were "thoroughly and ably documented with photographs by , the clan’s newest photographic talent," according to Bob Poole in his history of the National Geographic.
Publishing and Internet
In 1979, Grosvenor launched the fine arts magazine Portfolio. "Since no magazine was going to hire a 27-year-old to be editor in chief, the only solution was to start my own," he told a reporter for the Palm Beach Post. In 1983, Portfolio was a Finalist for a National Magazine Award in the General Excellence category. In 1992, Grosvenor founded the literary magazine Current Books, which included 20-25 excerpts of recent books in each issue. It published an eclectic mix of writing by such authors as Martin Amis, E.L. Doctorow, Henry Louis Gates, Jr., Jane Goodall, Stephen Hawking, Richard Leakey, John McPhee, Bill Moyers, Joyce Carol Oates, George Plimpton, Salman Rushdie, and John Updike. Although Current Books published for only three years, it claimed to be "the most widely distributed book publication in bookstores" at the time with copies for sale in 3,840 stores. The magazine was widely regarded in the literary community and in 1995 Grosvenor was asked to serve on the NEA's Literary Publishing Panel. Its members elected him as the Chairman of the panel. In 1996, Grosvenor founded KnowledgeMax, an online bookseller and elearning company, which merged with Sideware Systems in 2000. The resulting company, called KnowledgeMax, Inc., was publicly traded until 2003.
American Heritage
In 2007 Grosvenor led a group of investors who purchased American Heritage from Forbes. Grosvenor said, “When I read inThe New York Times that American Heritage had folded, I said, 'We just can’t let this happen,’ " Grosvenor told an interview in 2009. "I contacted the Forbes family and said, 'This is like intellectual preservation. It’s important to save battlefields and historic homes, but this is the magazine that writes about the battlefields and the historic homes.’ And luckily the Forbes family agreed with me and we formed a new company to save it.” Although American Heritage suspended print publication in 2012, it continues in digital form. In 2012 and 2013, Grosvenor led a team developing Fourscore, an educational website offering thousands of essays and documents for teaching American history and government. Although American Heritage was forced to stop print publication in 2012, Grosvenor led a group of volunteers that relaunched a digital version of the magazine in June 2017.
Writing
Grosvenor is the author, with Morgan Wesson, of Alexander Graham Bell: The Life and Times of the Man Who Invented the Telephone, a biography of his great-grandfather. He also authored Try it!: the Alexander Graham Bell Science Activity Kit, published by the National Geographic Society in 1992. He has also edited a number of anthologies from American Heritage and Horizon Magazines.
