Jack Ryan (character) Jack Ryan (character) John Patrick "Jack" Ryan, Sr. is a fictional character created by author Tom Clancy and featured in his Ryanverse novels, which have consistently topped the New York Times best seller list over 30 years. Since Clancy’s death in 2013, four other authors have continued the Ryan franchise and its other connecting series with the approval of the Clancy family estate: Mark Greaney, Grant Blackwood, Mike Maden, and Marc Cameron. The son of a Baltimore police detective and a nurse, Jack Ryan is a former U.S. Marine and stockbroker who became a history teacher at Boston College in
John Clark (Tom Clancy character) flag attacks designed to blame the current president, whose moderate stance on several issues compelled a secret cabal to act to have him removed from power. Clark was later arrested for murder, but was released from police custody soon after. Clark briefly appears in "Line of Sight", where he assassinates a Romanian crime boss who had a vendetta against Jack Ryan Jr. in revenge for killing one of his associates in a previous novel. Outside the novels, John Clark's career continues further in the "Rainbow Six" video game series. In "", Clark retires and passes the leadership of Team Rainbow