The term "bestselling" refers to a book, album or other product that has sold more copies than any other title in its particular category. It is often used as an indicator of popularity and success within the marketplace.
The shift from print to digital books will not have adverse effects on the books of bestselling authors and those with significant platforms. (readersfavorite.com)
Your competition likely isn't a big time bestselling author with a 20 + year publishing history or major movie franchise, so their pricing won't help you. (amarketingexpert.com)