According to research, the earliest novel series could be traced back to ancient Greece and was called Elysium. The novel was a collection of adventure stories set in heaven, including many myths and religious legends such as Athena, Isis, Ares and other heroes. In medieval Europe, novels gradually became an important form of literature. During the Italian Renaissance, there were many famous novelists such as shakespeare, dante, and bocaccio. Their works were the pioneers of modern novels, such as Hamlet and King Lear, Dante's Divine Comedy, and Boccaccio's Legend of the Giant. With the development of the industrial revolution, the form of novels also changed. In the second half of the 19th century, novels gradually embarked on the road of realism, such as William Faulkner's The Sound and the Fury, George Orwell's 1984, etc. After the 20th century, novels gradually developed into the mainstream form of literature, such as Ernest Hemmingway's The Sun Also Rises, Margaret Atwood's The Abandoned City, Hugo's Notre-Dame de Paris, etc.