Signe Hammarsten-Jansson that her presence is strongly felt in a number of the books Tove wrote after the death. The melancholic "Sent i November" (1970) deals themes of leaving and loneliness, and is typically considered the most mature of the "Moomin" series. "Sommarboken" (1972) concerns a young girl whose mother has died and her relationship with her grandmother. Hammarsten-Jansson's death marked the end of the "Moomin" series of novels and Jansson's literary output became primarily adult-oriented. Signe Hammarsten-Jansson Signe "Ham" Hammarsten-Jansson (née Hammarsten, 1 June 1882 Hannäs, Sweden - 6 June 1970 Porvoo) was a Swedish graphic artist who designed, among other
Sophia Jansson "Jaana" in 1965. In May 2003, The Finnish Embassy in London arranged for events to surround the recent translation of Tove Jansson's 1972 "Sommarboken", a novel which featured the fictionalized life of the young Sophia on an island. During this event, publishers presented works by Sophia Jansson and Johanna Sinisalo. Jansson was later interviewed in June 2003 by "The Daily Telegraph" where she explained the details surrounding the story presented in "Sommarboken" and the relationship shared between Jansson and her aunt, Tove Jansson. She would write in more detail about this topic in 2006 in the Scandinavian Review, and again