When Moomintroll learns that a comet will be passing by, he and his friend Sniff travel to the Observatory on the Lonely Mountains to consult the Professors. Along the way, they have many adventures, but the greatest adventure of all awaits them when they learn that the comet is headed straight for their beloved Moominvalley.

It is spring in the valley and the Moomins are ready for adventure! Moomintroll and his friends Snufkin and Sniff find the Hobgoblin's top hat, all shiny and new and just waiting to be taken home. They soon realize that his is no ordinary hat; it can turn anything—or anyone—into something else!

When a flood sweeps through the valley, the Moomins must find a new house. And with typical Moomin good luck, one just happens to be floating by. It looks normal enough, but there are curtains where one wall should be, strange rows of lights, and other odd amenities. Then Moomintroll and the Snork Maiden disappear, and the family realize that the house may hold the answers to more than they ever dreamed.

When stricken with a severe cold, Moominpappa decides to set down an account of his eventful youth, which he shares chapter by chapter with Moomintroll, Sniff, and Snufkin.

Everyone knows the Moomins sleep through the winter. But this year, Moomintroll has woken up early. So while the rest of the family slumber, he decides to visit his favorite summer haunts. But all he finds is this strange white stuff. Even the sun is gone! Moomintroll is angry: whoever Winter is, she has some nerve. Determined to discover the truth about this most mysterious of all seasons, Moomintroll goes where no Moomin has gone before.

One Moomin, two trees, three umbrellas, four clouds... Count along with Moomintroll all the way from one to ten, and beyond. A companion volume to Moomin's Little Book of Words, this chunky little board book is just right for little hands and early learning — and there's plenty of Moomin magic along the way.

Now that autumn is turning into winter, a group of unlikely friends — including the Fillyjonk, the Hemulen, and Toft — are waiting in Moominvalley to see the Moomins, for winter doesn't seem right without them. But the Moomins are not at home. So all the visitors settle down to await their return, and oddly enough find themselves warming up to their new life together. For Moominvalley is Moominvalley still, even without the Moomins in it.

Leave Moominvalley? Is it possible? Yes, even the Moomin family need a change of scenery sometimes, so they're off to live in a lighthouse on a tiny island. Here they find space to grow, and to do things they couldn't in their comfortable, cluttered valley home. As they discover their new home, the family also discover surprising, and wonderfully funny, new things about themselves.

Here are nine delightfully funny stories about the triumphs and tribulations of the citizens of Moominvalley. Readers will discover how the Moomin family save young Ninny from permanent invisibility, and what happens when Moomintroll catches the last dragon in the world. Some of the characters in these tales will be brand-new to Moomin fans, but there are lots of old friends to meet as well.