This beautifully-illustrated picture book is a brand new interactive story, with real letters to open, based on Tove Jansson's beloved Moomin characters and the classic world of Moominvalley. A treat for Moomin fans old and new, it is sure to be treasured for years to come.

"Dear Moomintroll . . . here's a letter for you!"

Moomintroll's best friend Snufkin has left Moomintroll a special surprise in the letterbox - a treasure hunt! Follow Moomintroll as he explores Moominvalley and finds all the clues Snufkin has left, leading to an exciting surprise. Open the envelopes inside this book and find letters from all your favourite Moomin characters, including postcards from Moominpappa, a little book from Little My, a pancake recipe from Moominmamma - and more!