Dreamsnake

Dreamsnake is a 1978 science fiction novel by American writer Vonda N. McIntyre. It is an expansion of her 1973 novelette "Of Mist, and Grass, and Sand", for which she won her first Nebula Award in 1974. The story is set on Earth after a nuclear holocaust. The central character, Snake, is a healer who uses genetically modified serpents to cure sickness—one snake is an alien "dreamsnake", whose venom gives dying people pleasant dreams. The novel follows Snake as she seeks to replace her dreamsnake after its death.