The Moomins and the Great Flood

The Moomins and the Great Flood (in the original Swedish it is The Little Trolls and the Great Flood) is a book written by Finnish author Tove Jansson in 1945. It was the first book to star the Moomins during the end of World War II, but is often seen as a prequel to the main Moomin books, as most of the main characters are introduced in the next book.