The novella "Metamorphosis" was written by Franz Kafka. It was published in 1915 and is one of Kafka's best-known works. The story revolves around Gregor Samsa, who wakes up to find himself transformed into a huge insect and explores his struggle with this condition and its impact on his family. Kafka wrote this novella in German, and it remains one of the most celebrated works of 20th-century literature.