The Conductors by Nicole Glover

An Underground Railroad but with magic P. Djeli Clark ...a delightfully genrebending debut Tananarive Due Meet Hetty Rhodes a former conductor on the Underground Railroad who now uses her magic to solve crimes in her community in a postCivil War world. As an escaped slave Hetty Rhodes helped dozens of people find their own freedom north using her wits and her magic. Now that the Civil War is over Hetty and her husband Benjy still fight for their people by solving the murders and mysteries Paperback softback