Thea Stilton #12: Thea Stilton and the Princes Emerald

When the Thea Sisters' friend Ashvin is in trouble, they rush to his aid in India! Ashvin has been working to take all the monkeys that live in the big city and bring them back to their natural jungle environment. But the monkeys have suddenly started stealing jewels! When the monkeys steal the Indian Prince's emerald, Ashvin is devastated. Someone must be behind this terrible monkeying around. Can the Thea Sisters help solve the mystery?