Harriet Tubman Author:Maryann N. Weidt Children's history of Harriet Tubman. Tubman rescued over 300 slaves using the Underground Railroad. She was nearly killed at 15 when an overseer hit her on the head with an iron weight. She escaped from slavery by following the North Star to freedom. She served the Union during the Civil War as a spy, cook, nurse and soldier -- yet was neve... more »r paid for her work.« less