An autobiography is the story of a person’s life written or told by that person. A biography is the story of a person’s life written or told by another person. A fable is a story that teaches a moral or a lesson. It often has animal characters. Fantasy novels are often set in worlds much different from our own and usually include magic, sorcery and mythical creature. A folktale is a story that has been passed down, usually orally, within a culture. It may be based on superstition and feature supernatural characters. Folktales include fairy tales, tall tales, trickster tales and other stories passed down over generations. A legend is a story that has been handed down over generations and is believed to be based on history, though it typically mixes fact and fiction. The hero of a legend is usually a human. A myth is a traditional story that a particular culture or group once accepted as sacred and true. It may center on a god or supernatural being and explain how something came to be, such as lightning or music or the world itself. Science fiction stories examine how science and technology affect the world. The books often involve fantasy inventions that may be reality in the future.