Professor Tuesday's Awesome Adventures in History

In this third book in the Professor Tuesday’s Awesome Adventures in History series, Jesse and Tamika want to learn about how slaves escaped to freedom along the western route of the Underground Railroad. However, there is sometimes danger in the past! Professor Tuesday wonders how he will keep them safe as they explore history in his magnificent Tuesday Teleporter until he gets a crazy and wonderful idea. But, do the two classmates have the courage to witness the terrors of slavery and the frightening run to freedom?