Geronimo goes on a TV gameshow in order to keep his newspaper from being taken over by Cheesecake.

It's Halloween on Mouse Island, and it seemed like everyone was out to get me, Geronimo Stilton! My cousin Trap kept pulling scary pranks on me. And then my sister Thea told me I had to write a book about Halloween in less than one day! Before you could say boo, my nephew Benjamin had dragged me to a graveyard to do research. There I met a very spooky mouse who -- yikes! -- tried to lock me up in her coffin! Oh, how would a 'fraidy mouse like me ever...

Geronimo is invited by his friend Creepella von Cacklefur to her family's spooky castle, and he is surrounded by the gloom of the castle as well as by Creepella's creepy family!

Geronimo follows clues in a diary all the way to Mouse Everest in search of his old friend Professor von Volt who has mysteriously disappeared.

Geronimo and friends go to the Eyptian Museum just before Halloween to investigate what seems to be a real live mummy.

MouseStar 1 is surrounded by floating space junk! It's yucky -- and dangerous. It's coming from a nearby planet, Cleanix. Geronimo Stiltonix goes to visit, and discovers that the aliens there are very wasteful. Even worse, robots that they've thrown in the trash have started to rebel! Can the spacemice restore harmony before the robots take over?

When Geronimo gets a call to help Hercule Poirat solve a mystery at the same time as his date with Petunia Pretty Paws, what is a gentlemouse to do?

When Geronimo gets lost looking for hidden treasures in the Gobi Desert, he comes across giant dinosaur bones.