Princess Amélie Rives Troubetzkoy (August 23, 1863 – June 15, 1945) was an American author of novels, poetry, and plays. The Quick or the Dead? (1888), her first novel, which sold 300,000 copies, created more of a sensation than any of her later work. Her 1914 novel, World's End was reputed to be "the best seller in New York City". Described as a genius who was morbidly sensitive, she was a woman of moods and fancies, but in manner, as simple as a child.