In some ways this book has a very different feel to it than the first two. Where in the first two the children must use their imaginations to create adventure while on holiday in the Lake District, in ‘Peter Duck’ no imagination is needed.
Although the setting is completely different, the characters are the same. There is John, brave, intelligent and honest; Susan, capable and sensible; Titty, imaginative and ready for adventure; Roger, curious and hungry; Nancy, the Terror of the High Seas; Peggy, dependable, yet timid; and Captain Flint (a.k.a. Uncle Jim), impulsive and caring. They are joined by Peter Duck, a kind, wise old seaman, and red-headed Bill, an orphan set on going to sea.
What starts as a pleasure voyage on the open sea quickly turns into a treasure hunt to the Caribbees, with real-life pirates in hot pursuit. The Swallows and Amazons must face storms, earthquakes, and waterspouts, as well as murderers and cut-throats before their journey ends. The dangers the adventurers face may seem fantastical when set in list form, yet in the telling of it the reader is left wondering if much of Arthur Ransome’s story could possibly be true and not an invention of his imagination.