Which famous author founded her own publishing company called 'Pottermore' (later renamed Wizarding World Digital) that revolutionized how authors can retain digital rights and sell directly to fans?

The intersection of literature and commerce has created some fascinating business stories. Many renowned authors have ventured beyond books into retail empires, branded merchandise, and innovative business models. This trivia tests your knowledge of how literary figures have transformed their creative works into commercial enterprises, exploring the business acumen behind some of literature's most celebrated names.

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J.K. Rowling
Margaret Atwood
Stephen King
George R.R. Martin