Best-selling books are titles that achieve high sales figures, often ranking on lists such as the New York Times Best Sellers or Amazon's Best Sellers. These books can span various genres, including fiction, non-fiction, and self-help, appealing to a wide range of readers. Factors contributing to their success include engaging storytelling, relatable themes, and effective marketing strategies. Many best-selling books become cultural phenomena, influencing trends and sparking discussions. Authors like J.K. Rowling and Stephen King have produced multiple best-sellers, while series such as Harry Potter and The Hunger Games have captivated audiences worldwide. The popularity of these books often leads to adaptations in film and television.