Award-winning author KAREN KOSTYAL has written nearly twenty adult and children's titles on human history and natural history, prehistory and geologic history, music, world cultures, and wars. Her most recent works include Christmas in Williamsburg and 1776: A New Look at Revolutionary Williamsburg, both children's books published jointly by National Geographic and Colonial Williamsburg. She has also written Great Migrations, the companion book to the National Geographic Channel's acclaimed series on animal migration; Abraham Lincoln's Extraordinary Era, the official Lincoln birth bicentennial book of the Lincoln Presidential Library and Museum; Lost Boy, Lost Girl: Escaping Civil War in Sudan, co-authored for a National Geographic young adult memoir series; and photographer Flip Nicklin's memoir, Among Giants: A Life With Whales. She has also collaborated with Grateful Dead drummer Mickey Hart on Songcatchers: In Search of the World's Music and written Stonewall Jackson: A Life Portrait and Art of the State of Virginia.