Clear and Present Danger is a political thriller novel, written by Tom Clancy and published on August 17, 1989. A sequel to The Cardinal of the Kremlin (1988), main character Jack Ryan becomes acting Deputy Director of Intelligence in the Central Intelligence Agency, and discovers that he is being kept in the dark by his colleagues who are conducting a covert war against a drug cartel based in Colombia. It debuted at number one on The New York Times bestseller list. A film adaptation, featuring Harrison Ford reprising his role as Ryan, was released on August 3, 1994.

Thomas Leo Clancy Jr. was an American novelist. He is best known for his technically detailed espionage and military-science storylines set during and after the Cold War. Seventeen of his novels have been bestsellers and more than 100 million copies of his books have been sold. His name was also used on screenplays written by ghostwriters, nonfiction books on military subjects occasionally with co-authors, and video games. He was a part-owner of his hometown Major League Baseball team, the Baltimore Orioles, and vice-chairman of their community activities and public affairs committees.