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Castle Rock (sometimes referred to as the Rock) is a fictional town appearing in Stephen King's fictional Maine topography, providing the setting for a number of his novels, novellas, and short stories. Castle Rock first appeared in King's 1979 novel The Dead Zone and has since been referenced to or used as the primary setting in many other works by King.
As a native of Durham, Maine, King was inspired by his hometown when creating Castle Rock. The town name is taken from the fictional mountain fort in William Golding's 1954 novel Lord of the Flies.[1]
Other notable fictional towns that King has used as the central setting in more than one work include Derry and Jerusalem's Lot.
https://en.wikipedia.org/wiki/Castle_Rock_(Stephen_King)
how many prototypes are there?