From Citizendium, the Citizens' Compendium
He wrote many short stories, of which perhaps the best known, "Metamorphosis", tells of a young man who wakes up to find he has turned into a giant cockroach.
The protagonists of the last two novels, called 'Joseph K.' in The Trial and just 'K.' in The Castle, are ensnared in a vast and hopeless bureaucracy.
Kafka wished to destroy all his writings, and it is only thanks to his friend Max Brod that they survive.