When the Moomin family members need a change of scenery, they decide to take up residence in a lighthouse. 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.

When a flood sweeps through the valley, the Moomins must find a new house. And with their 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 realizes that the house may hold the answers to more than they ever dreamed.

The Moomins and the Great Flood is the first book about the Moomins, originally published in 1945. It tells the story of Moominmamma and Moomintroll as they embark on a quest to find the missing Moominpappa and eventually discover the beautiful Moominvalley.

As they journey through a dark and mysterious forest, they encounter a flood of epic proportions, testing their resilience and courage. The story is set against the backdrop of a natural catastrophe, which adds an element of suspense and adventure to their journey.

With Moominmamma's kindness and patience, they face numerous challenges, symbolizing themes of family, hope, and perseverance. The book is beautifully illustrated with black and white artwork, bringing the whimsical world of the Moomins to life.