Children's literature R. M. Ballantyne and G. A. Henty specializing in the production of adventure fiction for boys. This inspired writers who normally catered to adult audiences to write for children, and an example is Robert Louis Stevenson's (1850–94) classic pirate story "Treasure Island" (1883). In the years after the First World War, writers such as Arthur Ransome (1884–1967) developed the adventure genre by setting the adventure in Britain rather than distant countries. Ransome began publishing in 1930 his Swallows and Amazons series of children's books about the school-holiday adventures of children, mostly in the English Lake District and the Norfolk Broads.
Swallows and Amazons (2016 film) based on Ransome's book, but the script incorporates many changes to the plot. It chronicles the story of the Walker children on their holiday in the Lake District in the summer of 1935. They want to camp on an island in the lake. When they get there in the boat "Swallow", they soon discover they are not alone. Two other children, the Blacketts, also known as the "Amazons", have set up camp there, and a battle for the island begins. But with Britain on the brink of war and a "secret agent" looking for the Blackett children's uncle, they have