Find out about the life of Harriet Tubman and how her brave actions working to "conduct" the Underground Railroad helped the Union Army in the Civil War lead more than 700 slaves to freedom. Learn about Harriet Tubman's life, achievements, and the challenges she faced along the way. The Level 2 text provides accessible, yet wide-ranging information for independent readers. National Geographic Kids Readers have been a hit in the competitive beginning reader category, and this book builds on that success with the same careful text, brilliant photographs, and fun approach to high-interest biographies of fascinating people such as Harriet Tubman, that has proved to be a winning formula with kids.