Jason Trent is seventeen and travels back in time from 2097 to 1863 Virginia to find his twin sister Jaynie was accidentally transported there in her father's time machine. This is a time of Civil War and runaway slaves. Jason teams up with former slave Daniel Williams who witnessed Jaynie's abduction by traveling minstrels. Together the two boys track the abductors and during a three-week odyssey visit wartime Washington, are captured as spies, encounter the Underground Railroad, and stop a conspiracy that could have otherwise changed the course of history. Vincent Sescoe is a master storyteller whose young readers will enjoy this novel of high adventure while they also learn fascinating, true life details of the Civil War. Highly recommended for school and community library collections, the text of Double Time is occasionally enhanced with black and white illustrations by Clinton Helms.