The Sons - The Judgment, The Stoker, The Metamorphosis, and Letter to His Father

I have only one request," Kafka wrote to his publisher Kurt Wolff in 1913. "'The Stoker,' 'The Metamorphosis,' and 'The Judgment' belong together, both inwardly and outwardly. There is an obvious connection among the three, and, even more important, a secret one, for which reason I would be reluctant to forego the chance of having them published together in a book, which might be called The Sons."