<P> Herman Raucher wrote the film script in the 1950s during his tenure as a television writer, but "couldn't give it away ." In the 1960s, he met Robert Mulligan, best known for directing To Kill a Mockingbird . Raucher showed Mulligan the script, and Mulligan took it to Warner Bros., where Mulligan argued the film could be shot for the relatively low price of $1 million, and Warner approved it . They had so little faith in the film becoming a box - office success, though, they shied from paying Raucher outright for the script, instead promising him ten percent of the gross . </P> <P> When casting for the role of Dorothy, Warner Bros. declined to audition any actresses younger than the age of 30; Jennifer O'Neill's agent, who had developed a fondness for the script, convinced the studio to audition his client, who was only 22 at the time . O'Neill auditioned for the role, albeit hesitantly, not wanting to perform any nude scenes . O'Neill got the role and Mulligan agreed to find a way to make the film work without blatant nudity . </P> <P> Nantucket Island was too far modernized in 1970 to be convincingly transformed to resemble an early 1940s resort, so production was taken to Mendocino, California, on the West Coast of the US . Shooting took place over eight weeks, during which O'Neill was sequestered from the three boys cast as "The Terrible Trio," in order to ensure that they did not become close and ruin the sense of awkwardness and distance that their characters felt towards Dorothy . Production ran smoothly, finishing on schedule . </P> <P> After production, Warner Bros., still wary about the film only being a minor success, asked Raucher to adapt his script into a book . Raucher wrote it in three weeks, and Warner Bros. released it prior to the film to build interest in the story . The book quickly became a national bestseller, so that when trailers premiered in theaters, the film was billed as being "based on the national bestseller," despite the film having been completed first . Ultimately, the book became one of the best selling novels of the first half of the 1970s, requiring 23 reprints between 1971 and 1974 to keep up with customer demand . </P>

Where was the film summer of 42 filmed