Previously unknown stories, scripts, letters and musical compositions by the late author Anthony Burgess have been found in an archive of his possessions.
The contents of three of his houses were left to the International Anthony Burgess Foundation in Manchester by his widow, who died in 2007.
Most famous for writing A Clockwork Orange, Burgess wrote 33 novels in all.
Researchers have now uncovered some 20 unpublished short stories as well as unproduced film and theatre scripts.
They include a previously unknown movie script about Napoleon Bonaparte, which was to have been filmed by director Stanley Kubrick.
The pair had worked together when Kubrick filmed Burgess' 1962 novel A Clockwork Orange, which depicted the ruthless sexual "ultra-violence" of a teenage gang leader in a lawless society.
The film caused an international outcry when it was released in 1971, leading Kubrick to withdraw it from cinemas. But it is to be recognised as a classic with a special screening at the Cannes Film Festival next week.
Burgess' original screenplay for the film is among the most prized artefacts at the International Anthony Burgess Foundation.
The typescript, which has never been published, was rejected by Kubrick, who opted to write his own instead.
Burgess' version is interesting because it is "very different from the novel", according to Dr Andrew Biswell, the author's biographer and the foundation's director.
"It's actually quite a bit more violent than the novel. There's a scene early on where Alex opens his bedroom cupboard and it's full of drugs, hypodermic needles and a child's skull."