A Most Perilous Journey — Kathleen Ernst

Wisconsin widow Hanneke Bauer, a German immigrant, is a fervent abolitionist. After yearning to play an active role on the Underground Railroad, she agrees to help shepherd a Negro woman on her journey from slavery to freedom. Several Railroad conductors have recently been killed in southern Wisconsin, so she is acutely aware of the dangers she faces. Finding the latest victim's body is frightening, but does not deter her. She soon learns, however, that nothing could have prepared her for the perils waiting along the journey. 

Hanneke believes that future Underground Railroad trips are essential...but can she live long enough to make them?