In children's literature, a subtitle serves as an extension of the main title, giving readers insight into the book's themes, characters, or specific topics it covers. For example, a book titled "The Adventures of Timmy" may have a subtitle like "A Journey Through the Enchanted Forest," making it clear that the narrative involves adventure and a magical setting. Subtitles can engage potential readers by highlighting exciting elements, thus enhancing the appeal of the book while helping parents and educators understand its educational or entertainment value.