Dirty Harry novels of the four first "Dirty Harry" films as tie-ins. Author and screenwriter Phillip Rock wrote the novelization of "Dirty Harry" in 1971, based on an early draft of the script. Mel Valley wrote the sequel, "Magnum Force", in 1973. Wesley Morgan novelized "The Enforcer" in 1976. The "Sudden Impact" novelization was written by Joseph Stinson, one of the screenwriters. Stinson, who had rewritten the originally independent script as a "Dirty Harry" vehicle for Eastwood, adapted the novel in 1983. Following "The Enforcer", Eastwood announced that he would not make any further "Dirty Harry" films (he eventually returned to the role
Clint Eastwood in the 1970s the filming of "Breezy" had finished, Warner Brothers announced that Eastwood had agreed to reprise his role as Detective Harry Callahan in a sequel to "Dirty Harry", running under the title, "Vigilance". Writer John Milius came up with a storyline in which a group of rogue young officers in the San Francisco Police Force systematically exterminate the city's worst criminals, portraying the idea that there are worse cops than Dirty Harry. David Soul, Tim Matheson, Robert Urich and Kip Niven were cast as the young vigilante cops. Milius was a gun aficionado and political conservative and the film would extensively