This book is not only funny but also mysterios and adventure. A giant diamond from a golf trophy is about to be stolen and sold to pirates. the only way that Geronimo Stilton can protect the diamond is by winning it to keep it safe.
The storyline of the book shows how you can use humour to not make mystery boring. this would be a very suitable book for any age. My friends all this book when I read it to them. They went crazy about the series!