Annie Duke is an American author, professional speaker, and decision strategist who focuses on decision-making under uncertainty. She is known for her work on the topic of quitting, aiming to encourage people to recognize the value in walking away from things. Duke is the author of two bestsellers, 'Quit: The Power of Knowing When to Walk Away' and 'Thinking in Bets', both published by Portfolio, a Penguin Random House imprint.