Tom Clancy, bestselling author of more than a dozen military thrillers, died Tuesday night in a hospital in Baltimore. He was 66.

Best known for his stories of espionage during the Cold War, Clancy wrote more than 14 books and dozens others were published under his name. His first novel, The Hunt for Red October, was published in 1984 and became a best seller, earning Clancy millions; in 1990, the book was adapted into a successful film starring Sean Connery and Alec Baldwin, who played Jack Ryan, Clancy's best known character. Jack Ryan appeared in nearly all of Clancy's novels, including 1987's Patriot Games, 1989's Clear and Present Danger and 1991's The Sum of All Fears.

Clancy was born 1947 in Baltimore, where he'd spend most of his life. In 1969, Clancy married his first wife, Wanda, whom he became separated from in 1996 and divorced from in 1997. In 1999, Clancy married Alexandra Marie Llewellyn, a freelance journalist he met shortly after his divorce.

Clancy's books served as an inspiration for a popular series of video games, most notably Tom Clancy's Rainbow Six and Splinter Cell, which were initially produced by Red Storm Entertainment, a company co-founded by Clancy in 1996.

His next book, Command Authority, is scheduled to be published on December 3.