Task: Text Categorization
Input (English): This author wrote one work in which Serenus Zeitblom narrates the story of his childhood friend and composer Adiran Laverkuhn. In another work, this author traced the decline of a wealthy German merchant family from Lubeck headed by Johann. In a third of this man's novels, the protagonist travels to a sanatorium to visit his cousin Joachim Ziemssen, but Behrens persuades Hans Castorp to stay at the title location. For 10 points, name this German novelist of Buddenbrooks and The Magic Mountain.
Output (English): Literature