Charles C. Mann is the author of 1491, which won the U.S. National Academy of Sciences' Keck award for the best book of the year. A correspondent for The Atlantic Monthly, Science, and Wired, he has covered the intersection of science, technology, and commerce for many newspapers and magazines here and abroad, including the New York Times, Vanity Fair, the Washington Post, and more. In addition to 1491, he was the co-author of four other non-fiction books. He is now working on a companion volume to 1491. His website is www.charlesmann.org. David H. Freedman is a contributing editor for Inc. Magazine, and has written on science, business, and technology for The Atlantic, The New York Times, The Harvard Business Review, Fast Company, Science, Wired, and many other publications. His newest book, Wrong, about why experts keep failing us, came out in June, 2010. His last book (coauthored) was A Perfect Mess, about the useful role of disorder in daily life, business, and science. He is also the author of books about the US Marines, computer crime, and artificial intelligence. Freedman's blog, "Making Sense of Medicine," takes a close, critical look at medical findings making current headlines with an eye to separating out the frequent hype. He lives near Boston.