Alan Gratz is the #1 New York Times bestselling author of twenty novels and graphic novels for young readers, including Heroes, Two Degrees, Captain America: The Ghost Army, Ground Zero, Refugee, Allies, Prisoner B-3087, and Ban This Book. A Knoxville, Tennessee native, Alan is now a full-time writer living in Asheville, North Carolina with his wife and daughter. Learn more about him online at www.alangratz.com.