Katy was born and raised in Jackson, Mississippi. She is the author of the novels The Story of Land and Sea, a New York Times Book Review Editor's Choice and one of Vogue's Best Books of 2014; Free Men; and The Everlasting, a New York Times Best Historical Fiction Book of 2020. Her writing has appeared in The Paris Review, The Los Angeles Review of Books, Oxford American, Granta, Literary Hub, and elsewhere. She received a PhD in history from the University of North Carolina at Chapel Hill and an MFA from the Bennington Writing Seminars, and is also the author of We Have Raised All of You: Motherhood in the South, 1750-1835. She lives in New Orleans.