A mystery picture book, Historien om någon sees the point-of-view character follow a red string of yarn through a Swedish 1950s house to learn the identity of an unknown visitor; a conceit that originally came from Møller-Nielsen.

Historien om någon is a mystery picture book with an unseen point-of-view character serving as a stand-in for the reader,[1][2] who searches for an unknown visitor in a home.

[1][3] In a hide-and-seek-like fashion,[4] the reader follows the trail of a red string of yarn from the point-of-view character's grandma's knitting, which the visitor has brought with them.

[5][8] The tactile pictures in this edition were created by Eva P. Eriksson and Marguerite Ahlbom,[5][8] and are textured and raised from the page, allowing children with impaired vision to recognize the everyday objects portrayed through touch.

[3] In their book Assistive Technology for Blindness and Low Vision, writers Roberto Manduchi and Sri Kurniawan note that although the tactile edition changes the reading experience – turning the disorder in the original into order, and having less interaction between text and illustration – and no longer carries with it the visual culture history, it still succeeds in being accessible to blind children.

[4] Later books following the tradition of Historien om någon, with its use of space as a play area in picture books, include Sanna Mander's Nyckelknipan (2017),[4][9] Aron Landahl's Dropp dropp (2019), and Ebba Berg's and Alexander Jansson's Tassemarker (2019); Upsala Nya Tidning considered the latter a worthy successor to Historien om någon, although less innovative.