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Repairman Jack is a character in a series of novels by F. Paul Wilson. Jack initially was just one protagonist in a string of related novels, but then gained his own series known as The Repairman Jack series. This series of novels uses realistic, thriller-like situations to tell a story with a broad supernatural theme. It is technically a spin-off branch of the aforementioned larger, overarching supernatural horror series, The Adversary Cycle.