Diana Gabaldon, best-selling author of the popular Outlander series, appears at the 17th annual Library of Congress National Book Festival at the Walter E. Washington Convention Center in Washington D.C. on Saturday, September 2, 2017. Diana Gabaldon has written eight Outlander novels, which have sold more than 28 million copies. Her new book, "Seven Stones to Stand or Fall: A Collection of Outlander Fiction" comprises seven novellas of Outlander fiction, two of which have never been published. (Photo by Jeff Malet)