The Facts in the Case of M. Valdemar is about a mesmerist, who puts a man in a suspended hypnotic state at the moment of death. An example of a tale of suspense and horror, it is also, to a certain degree, a hoax as it was published without claiming to be fictional, and many at the time of publication (1845) took it to be a factual account. Poe toyed with this for a while before admitting it was a work of pure fiction. (Excerpt from Wikipedia)
Edgar Allan Poe (born Edgar Poe; January 19, 1809 – October 7, 1849) was an American writer, editor, and literary critic. Poe is best known for his poetry and short stories, particularly his tales of mystery and the macabre. He is widely regarded as a central figure of Romanticism in the United States and of American literature as a whole, and he was one of the country's earliest practitioners of the short story. He is generally considered the inventor of the detective fiction genre and is further credited with contributing to the emerging genre of science fiction. He was the first well-known American writer to earn a living through writing alone, resulting in a financially difficult life and career. (Wikipedia)