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 images, as well as the series of medals that were also issued. In 2006 Jansson was invited as a notable speaker for one of the Monthly Luncheons hosted by IWC Helsinki. In February 2007 Jansson was invited to speak at the Scandinavia House in New York City. In September 2008 Jansson participated as a member of the Committee of Honor in the renowned IBBY World Congress. Jansson participated in the Helsinki Design Week 2008. Sophia Jansson Vivica Sophia Jansson (born 1962) is the daughter of cartoonist Lars Jansson and the niece of the famous Finnish writer and painter Tove Jansson.