The Metamorphosis, Franz Kafka

The Metamorphosis was first published in 1915 and is one of the seminal works of fiction of the 20th century. Traveling salesman, Gregor Samsa, wakes to find himself transformed into a large, monstrous insect-like creature. The cause of Gregor's transformation is never revealed, and as he attempts to adjust to his new condition he becomes a burden to his parents and sister, who are repelled by the horrible, verminous creature Gregor has become.