Possible Clues:

• Pseudonym of famous American short-story writer, real name William Sydney Porter
• Porter's pen name
• Old king's literary pseudonym
• Just changing sides, he is accepted as a story-teller
• Storywriter known for twists
• Writer known for irony
• Master of literary twists
• American humorous writer, d. 1910
• "The Gift of the Magi" storywriter
• First bit of eroticism penned by absurdly horny writer