A best-selling book is a title that has sold a significant number of copies, often ranking high on sales lists. These lists can be compiled by various organizations, such as The New York Times or Amazon, and reflect the popularity of a book within a specific time frame. Best-sellers can span various genres, including fiction, non-fiction, and self-help. The term "best-seller" is often associated with books that resonate with a wide audience, leading to increased visibility and sales. Factors contributing to a book's best-seller status may include effective marketing, positive reviews, and word-of-mouth recommendations.