[1] The stories are set in the fictional town of Glimmerdagg ("Dew glimmer") in central Sweden, situated "somewhere between Karlskoga and Örebro", with the Söderskolan ("South School") for children age 7-13.

The books are written in a present tense, third-person narrative and using imperfect for flashback scenes.

Sune Andersson (full name: Karl Sune Rudolf Andersson) is a Swedish schoolboy, living in a two-storey, single-family house with his father Rudolf who works in an office, mother Karin who is a librarian, big sister Anna, and little brother Håkan "Bråkan" ("Hakan the Menace").

His childhood friend and girlfriend is Sophie Blixt, but Sune also shows interest in other girls, as long as they are not mean.

Sune was not the typical "tough guy" who used to fight or play soccer, instead he was more interested in girls.

Olsson illustrated the resulting book Sagan om Sune, published just before Christmas in 1984.