The Moomins (Swedish: Mumintroll) are the central characters in a series of books and a comic strip by Swedish-Finn illustrator and writer Tove Jansson. They are a family of trolls who are white and roundish, with large snouts that make them resemble hippopotamuses. The carefree and adventurous family live in their house in Moominvalley, in the forests of Finland, though in the past their temporary residences have included a lighthouse and a theatre. They have many adventures along with their various friends.
In all, nine books were released in the series, with five picture books and a comic strip being released between 1945 and 1993.
The Moomins have since been the basis for numerous television series, films and even a theme park called Moomin World in Naantali, Finland.
Description from Wikipedia.