In his 1962 book "My father is a cannibal", Bergman relates the experiences of two years spent with his wife in New Guinea from 1956 to 1958. He describes his adoption by the Papuan Chief Pinim, and his wife, Akintjes, and the festivals, ceremonies and cannibalistic practises of the native Papuans. The book also includes his observations of interesting plants and animals, including the tree kangaroos, forest turkeys, flame-coloured lianas, Bauhinia and flying beetles. In 1920, Bergman married Dagny Lindhé (born 1890), the daughter of major Nils Lindhé and Ida Arnell. He was the father of the nature photographer and writer Astrid Bergman (1927–2015). Bergman died in 1975 and was buried at Salem cemetery in Salem Municipality on the cape closest to Bornsjön. Bergman's awards: