It's the night of the big Cavemouse Idol competition, but Geronimo Stiltonoot isn't there. He has a cold, and goes to bed early. But when it's discovered that the contest 's valuable grand prize has been stolen, Geronimo is the main suspect! He must prove his innocence...or else he'll end up in enormouse trouble!

Geronimo Stilton's ancient ancestor Geronimo Stiltonoot is back in another prehistoric adventure! It's the night of the big Cavemouse Idol competition, but Geronimo Stiltonoot isn't there. He has a cold, and goes to bed early.That night someone came to Geronimo's house and took his dress and stole the grand prize. So when it's discovered that the contest's valuable grand prize has been stolen, Geronimo is the main suspect! He must prove his innocence or he'll end up in enormous trouble!Soon its discovered that the jokers did not know that how to joke and there were three of them not two,triplets and they had stolen the grand prize not Geronimo.The genre is mystery and the keyword is Dinosaur.

This book is one from the series of Geronimo Stilton books. It is my favourite from rest of all. Once again Geronimo Stilton is on an adventure full of mystery and adventures. zI love this BOOK a lot.This book make y ou eager to read the front part of the book.It has beautiful pictures in it which make it more interesting to read. This book should be read by each and everyone.