Which author's personal branding strategy transformed her pen name 'Robert Galbraith' into a marketing phenomenon after her true identity was revealed?

The publishing industry has evolved significantly in how books are marketed and branded to readers. Major publishing houses and independent authors alike have developed sophisticated branding strategies to help books stand out in an increasingly crowded marketplace. This trivia question tests your knowledge about one of the most successful book branding transformations in modern literature.

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J.K. Rowling
Stephen King (who wrote as Richard Bachman)
Nora Roberts (who wrote as J.D. Robb)
Daniel Handler (who wrote as Lemony Snicket)