"Peter Duck" is a children's novel written by Arthur Ransome, first published in 1939. It is part of the Swallows and Amazons series, which features a group of children who embark on adventurous sailing trips. In this story, the characters sail to an island and encounter a mysterious shipwreck, leading to a thrilling treasure hunt. The book combines elements of adventure and imagination, appealing to young readers. It showcases themes of friendship, exploration, and the joys of sailing. The characters, including the Swallows and the Amazons, work together to solve the mystery, making it an engaging read for children.