The Reluctant Dragon by Kenneth Grahane

The Reluctant Dragon is an 1898 children's story by Kenneth Grahame which served as the key element to the 1941 feature film with the same name from Walt Disney Productions. The story has also been set to music as a children's operetta by John Rutter, with words by David Grant.
The story takes place in the Berkshire Downs in Oxfordshire, where the author lived and where, according to legend, St George did fight a dragon. It is Grahame's most famous short story.