Geronimo's sister Thea Stilton narrates this tale packed with action, mystery and friendship! When the Thea Sisters' friend Ashvin is in trouble, they rush to his aid. In India! Ashvin has been bringing the monkeys that live in the big city back to their natural jungle environment, but the monkeys have suddenly started stealing jewels! Someone must be behind this terrible theft. Can the Thea Sisters solve the mystery?

Geronimo Stilton is the pseudonym of the famous Italian writer Elisabetta Dami. She has written the famous series of books on Geronimo Stilton. She co-owns the Italian based publishing company called Edizioni Piemme. She likes to get all her ideas through her travels to places around the world.