Intertwine (Norwegian: Tvillingsong) is the companion book of the documentary film with the same title by Norwegian artist Anne Tveit Knutsen. The film followed a couple of intellectual disabled female twins, Eli and Toril, from West Norway into their post middle age lives. The original intention of the artist was to explore the special way of communication between the twins and they with the outer world, but unexpectedly, Toril died of illness before the film was finished, leaving Eli facing the wild world alone, baffled. Fortunately Eli is obsessed with drawing. She has been always drawing with colour pencils on her notebooks since they were little. The drawings were abstract with colours and lines, sometimes letterlike symbols, mysterious and enchanting. The book contains some simple dialogues between the twins during the filmmaking. After Toril passed away, dialogues turned into monologues of Eli, which is full of incomprehension of death and perplexity for the future. The covers and inserts are all printed from the original drawings of Eli’s, which can be folded out to the original size. Being folded in, the drawings are otherwise hidden into another dimension. The Norwegian artist also simulated the isolation from and connection to the meanings of the surrounding the twins were experiencing throughout their life, by imitating the Chinese characters translated from the texts in the book, which she actually couldn’t understand. The book was designed by renown Chinese designer Yanrong Pan, and Chinese designer Yilei Wang, who is now based in Norway. The main paper used in the book was a type new developed paper that is light but strong and non-tearable, just like the connection between the twin sisters, fragile but inseparable.

Tvillingsong won The 2nd abC Art Book Award and was selected as one of the 100 books with the best design by Award360° in 2021.