Attack of the Bandit Cats

In this book, Geronimo Stilton, the editor of 'The Rodent's Gazette', is on a mission to save his kidnapped sister Thea. The story takes a twist when he finds out that the kidnapper is a group of pirate cats from the island of Catatonia. Geronimo, along with his cousin Trap and nephew Benjamin, sets out on an adventurous journey to rescue Thea.