By Thomas B. Allen.  ISBN 978-0-792-27889-4.  Copyright 2006.  Hardcover with 191 pages including appendices, index, and 62 illustrations. 

After she survived her master’s lash, escaped from slavery, and risked her life countless times to lead runaway slaves to freedom along the Underground Railroad, Harriet Tubman faced one of her biggest and most dangerous challenges.  
You are about to enter the undercover world of African-American spies, enslaved and free, risking everything in the name of freedom.  How were the Underground Railroad and slave songs used to pass messages?  What were “contrabands” and “Black Dispatches?”  What did Harriet Tubman have in common with the Secret Six and a maidservant in the home of Confederate President Jefferson Davis?  You’ll discover the answers and more as the action unfolds.