Two mice, one who sleeps inside the house in a clock and one who sleeps outside the house in a stump, follow complicated but strangely parallel paths and meet each other at a window.

CHRISTMAS COLLECTION. Taking a mouse to the movies can lead to letting him do other things, such as making a snowman, listening to Christmas carols, and decorating the Christmas tree.

As the tenth anniversary of Geronimo Stilton's first book approaches, his laptop with the manuscript for his latest book is stolen and he and his friends must track it down in time to share the new book at his anniversary party.

Geronimo, Thea, and their cousin Trap explore an old castle built by Grant Gentlemouse, the founder of New Mouse City, and when they find one hundred keys and only ninety-nine doors inside, they set off in search of the missing room.

While on vacation at the Bay of Whales with Petunia Pretty Paws, Geronimo Stilton comes across a great white whale that needs his help.

Little Mouse explores the symbols of autumn and delights in the diverse events of Halloween as he learns that they are not as frightening as they seem.

When a famous opera singer arrives at Gloomeria's Royal Mousetropolitan Theater to perform, the phantom of the theater threatens to ruin the show due to a grudge against her, forcing Geronimo and Creepella to investigate.

Chester and Wilson share the same exact way of doing things, until Lilly moves into the neighborhood and shows them that new ways can be just as good.

When the rodent residents of New Mouse City begin succumbing to stomachaches, hiccups, and weird green warts, Geronimo Stilton and his detective friend, Hercule Poirat, race against time to investigate before they also fall ill.

When their marine biology professor disappears, the Thea Sisters search for him, and together they try to stop some wicked mice from stealing a treasure lost in a shipwreck, after which they head to China to find another treasure.