It was a day that really ought to be filled with adventure... Moomintroll and his friends have heard of the legend of the Ocean's Song - held inside a shell, which only its finder can hear. Snufkin takes them to the island of the Hattifatteners but the friends have to turn back to escape a thunderstorm! Will they find the Ocean's Song, and get home in one piece?A brand new picture book adventure based on the beloved Moomin characters by Tove Jansson perfect for all Moomin fans young and old.