A moonlit Moomin adventure filled with friendship, imagination, and a search for hidden treasure. Details & Dimensions After days of rain, Moomintroll and his family set out for Lonely Island in search of treasure. When night falls before they arrive, the adventure continues by moonlight, bringing a gentle sense of mystery and discovery to this classic Moomin story. Moomin and the Moonlight Adventure by Tove Jansson Hardcover picture book, 32 pages8.5" x 10.25"