J.K. Rowling’s Hundred Million Debut

In 1997, J.K. Rowling released "Harry Potter and the Philosopher’s Stone," the first book in the Harry Potter series. The novel went on to sell an estimated 120 million copies, placing it among the rare individual books listed above 100 million worldwide. That put Rowling’s debut beside long-running bestsellers such as J.R.R. Tolkien’s "The Hobbit," while the full Harry Potter series grew into the best-selling book series in history.

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