The Gremlins is a children's book, written by Roald Dahl and published in 1943. It was Dahl's first children's book, and was written for Walt Disney Productions, as a promotional device for a feature-length animated film that was never made. With Dahl's assistance, a series of gremlin characters were developed, and while pre-production had begun, the film project was eventually abandoned, in part because the studio could not establish the precise rights of the "gremlin" story, and in part because the British Air Ministry was heavily involved in the production because Dahl, who was on leave from his wartime Washington posting, insisted on final approval of script and production.
The story concerns mischievous mythical creatures, the Gremlins of the title, often invoked by Royal Air Force pilots as an explanation of mechanical troubles and mishaps. In Dahl's book, the gremlins' motivation for sabotaging British aircraft is revenge of the destruction of their forest home, which was razed to make way for an aircraft factory. The principal character in the book, Gus, has his Hawker Hurricane fighter destroyed over the English Channel by a gremlin, but is able to convince the gremlins as they parachute into the water that they should join forces against a common enemy, Hitler and the Nazis, rather than fight each other.