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. Source: Wikipedia (en)