"Metamorphosis" is a novella by Franz Kafka, first published in 1915. The story begins with a traveling salesman, Gregor Samsa, waking to find himself transformed into a monstrous insect-like creature. Confused, he looks around his room which appeared normal. He decides to fall asleep again and forget what happened in the hope that everything will revert back to normal. He tries to roll over to his right but discovers that he cannot due to his new body - he is stuck on his hard, convex back.
He reflects on how dreary life as a travelling salesmen is and how he would quit his job if his family were not dependent on his income. He looks at the wall clock and realizes that he has overslept and missed his train for work.
Gregor's mother knocks on the door and he answers her. She notices that his voice has changed and gets worried, also because he has never been late for work. His sister, Grete, to whom he was very close whispers through the door and begs him to open the door. All his family members think that he is ill and ask him to open the door. He tries to get out of bed but himself incapable of moving his body.
"Metamorphosis" is often cited as one of the seminal works of fiction of the 20th century and is widely studied in colleges and universities across the western world.