Book sales refer to the process of selling books to consumers, which can occur through various channels such as bookstores, online retailers, and direct sales at events. The sales figures can indicate the popularity of specific titles, genres, or authors, and are often tracked by organizations like the American Booksellers Association. The book industry has seen changes in sales trends due to factors like digital publishing and the rise of e-books. Amazon is a major player in online book sales, while independent bookstores continue to thrive by offering unique selections and community events.