Katie Hafner is the author or coauthor of several books, including A Romance on Three Legs, The Well, and Where Wizards Stay Up Late. She is a frequent contributor to the New York Times, covering healthcare and technology. She has also been on the staff of Newsweek and BusinessWeek. Her work has appeared in the New York Times Magazine, Esquire, Wired, the Huffington Post, the New Republic, and O: The Oprah Magazine. She lives in San Francisco.