Harriet Tubman, Secret Agent: How Daring Slaves and Free Blacks Spied for the Union During the Civil War | Thomas B. Allen
Provides a biography of this courageous ex-slave who worked to establish the Underground Railroad, became a Union Army spy, and helped more than seven hundred slaves find their way to freedom in the North.
Harriet Tubman, Secret Agent: How Daring Slaves and Free Blacks Spied for the Union During the Civil War | 
