A comic book is a publication that is made up of a series of comic strips, usually presented in a sequence of panels with text and images. Comic books are typically published on a regular schedule, and often tell a continuing story over multiple issues. They are typically characterized by their use of sequential art, a style of storytelling in which the images are used to depict the narrative. Comic books are often associated with the superhero genre, but they can encompass a wide range of genres and themes, including science fiction, fantasy, horror, and more. Comic books are often collected by fans, and many are considered to be works of art and cultural artifacts.