In the book world, best seller lists depend on a multitude of factors. Most specifically, it matters where you look and what sources you pay attention to.
Things like the New York Times bestsellers use sale figures among other criteria. Amazon bestsellers focus on number of sales only. Popular book recommendation site Goodreads has its own lists based on readers and rating numbers. Other platforms and publications have their own lists as well.
Although discrepancies exist, it is still possible to get a good picture of top-selling, quality fiction, nonfiction, and other category books published in 2023, and bestselling authors.