Anne LaBarr Duke is an American former professional poker player and author in cognitive-behavioral decision science and decision education. She holds a World Series of Poker (WSOP) gold bracelet from 2004 and used to be the leading money winner among women in WSOP history; she remains in the top five as of April 2023, despite having retired from poker and last cashing at a tournament in 2010. Duke won the 2004 World Series of Poker Tournament of Champions and the National Heads-Up Poker Championship in 2010. She has written a number of instructional books for poker players, including Decide to Play Great Poker and The Middle Zone, as well as an autobiography, How I Raised, Folded, Bluffed, Flirted, Cursed, and Won Millions at the World Series of Poker, in 2005. Duke authored two books on decision-making, Thinking in Bets: Making Smarter Decisions When You Don't Have All the Facts, and How to Decide: Simple Tools for Making Better Choices.