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The 21 Best-selling Books of All Time


14
Harry Potter and the Chamber of Secrets – 60 million
A young fan brandishes her copy of "Harry Potter and the Chamber of Secrets" at the Borders at Time Warner Center in New York City.
A young fan brandishes her copy of "Harry Potter and the Chamber of Secrets" at the Borders at Time Warner Center in New York City.
Astrid Stawiarz/Getty Images

The second book in the Harry Potter series, released in 1998, uncovers more of the mysteries of the wizard school Hogwarts and series villain Voldemort. It's difficult to say why some books in the series sell more or less than others – though they're all within about 10 million of each other, which is well within the expected margin of error and uncertainty.