Natur & Kultur is a Swedish publishing foundation with its head office in Stockholm. It is known for an extensive series of teaching materials, and its logotype is an apple tree. Overview. The publishing house was founded in 1922 by Johan Hansson and his wife, Jenny Bergqvist Hansson, focusing on educational and didactic literature. During the Second World War, it published anti-Nazi literature. It was transformed into a foundation in 1947.
https://en.wikipedia.org/wiki/Natur_%26_Kultur