Allan Folsom (born December 9, 1941) grew up in Boston, United States. In 1963, he worked as a camera man, editor, writer and producer in California. He then wrote scripts for TV series and films, such as Hart To Hart.
He has written five books: The Day After Tomorrow (1994), Day of Confession (1998), The Exile (2004), The Machiavelli Covenant (2006) and The Hadrian Memorandum (2009). His first novel, The Day After Tomorrow, debuted at #3 on the New York Times bestseller list and has sold over 1.2 million copies.
He currently lives in Santa Barbara, California with his family.