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 hand injury. While "Play Misty for Me" was attractive to Eastwood, "by the sadness of the character", he signed up for Dirty Harry and this was reported in the press in December 1970 that Malpaso would be producing the film in a joint venture with Warner Brothers. Many locations in the script were altered and moved to San Francisco. One evening Eastwood and Siegel had been watching the San Francisco 49ers in the Kezar Stadium in the last game of the season and thought the eerie Greek amphitheatre like setting would be an excellent location for shooting one of the