Literary sequels are works of fiction that continue the story of characters or events from a previous book. They often explore new themes, conflicts, or adventures while maintaining connections to the original narrative. Popular examples include J.K. Rowling's Harry Potter series, where each book builds on the last, and J.R.R. Tolkien's The Lord of the Rings, which follows the events of The Hobbit. These sequels can be written by the original author or by others inspired by the original work. They aim to expand the universe and deepen readers' understanding of the characters and their journeys, often attracting both new and returning audiences.