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Cover of the first edition, published by Simon & Schuster.
Sin Killer is a historical novel by American writer Larry McMurtry. It is the first, both in chronological and publishing order, of The Berrybender Narratives. Set in 1832, it follows the adventures of a clan of eccentric British aristocrats and their retainers as they begin a hunting expedition up the Missouri River.
The title refers to the nickname given to frontiersman Jim Snow, a Berrybender ally who violently hates sin of all kinds.