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's more than forty years since Jansson's Moomintrolls first appeared. I found the writing and invention as appealing as ever. She has a thistledown touch."--Michele Landsberg, The Washington Post Book World
"The adventures of the easygoing Moomintrolls have all the crispness and tart surprise of a lingonberry, thanks to Jansson's ineffably light touch, her uncanny sensitivity to universal childhood emotions, and her gift for terse, naturalistic dialogue."--Entertainment Weekly
"This book in Jansson's series about the Moomins and their friends-small, indescribable Scandinavian creatures-tells of their adventures in trying to save themselves from a comet. A gentle, offbeat fantasy." --The Horn Book