Allan R. 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 netted over 1.2 million copies.
He lives in Santa Barbara, California with his family.