 Jansson wrote the "Moomin" books for children, starting in 1945 with "The Moomins and the Great Flood".The next two books, "Comet in Moominland" and "Finn Family Moomintroll", published in 1946 and 1948 respectively, were highly successful in sales, adding to sales of the first book.For her work as a children's writer she received the Hans Christian Andersen Medal in 1966.