Out exploring one day, Penguin Pete spots an abandoned shipwreck and climbs aboard. He soon discovers that the ship is not completely abandoned: Horatio, the ship's mouse, remains. In this fourth book in the bestselling series, Penguin Pete and Horatio take the reader on an irresistible adventure on the bounding main. Full color.Out exploring one day, Penguin Pete spots an abandoned shipwreck and climbs aboard. He soon discovers that the ship is not completely abandoned: Horatio, the ship's mouse, remains. In this fourth book in the bestselling series, Penguin Pete and Horatio take the reader on an irresistible adventure on the bounding main. Full color.