Aimed at children of 5 years and above, this book tells of Mary''s adventures when she joins her Uncle Pe te on board his pirate ship. They set sail on the high seas to rescue Pete''s missing pirate pals. 'Aimed at children of 5 years and above, this book tells of Mary''s adventures when she joins her Uncle Pe te on board his pirate ship. They set sail on the high seas to rescue Pete''s missing pirate pals. '