Denise Kiernan is a journalist, producer, and the New York Times best-selling author of the narrative nonfiction books, The Last Castle and The Girls of Atomic City. Joseph D’Agnese is a journalist, author and ghostwriter who has written for both adults and children. With his wife, Denise Kiernan, he has authored several books on U.S. history, including Signing Their Lives Away, Signing Their Rights Away, and Stuff Every American Should Know. They live in North Carolina.