In the Chamber of Secrets: J.K. Rowling’s Net Worth - The New York Times
James B. Stewart
To start with the obvious, there’s the source of her wealth: The seven Harry Potter books have sold an estimated 450 million copies, with estimated total revenue of $7.
['To', 'start', 'with', 'the', 'obvious,', 'there’s', 'the', 'source', 'of', 'her', 'wealth:', 'The', 'seven', 'Harry', 'Potter', 'books', 'have', 'sold', 'an', 'estimated', '450', 'million', 'copies,', 'with', 'estimated', 'total', 'revenue', 'of', '$7.']