Cora is a slave on a cotton plantation in Georgia, an existence made even more hellish by her status as an outcast among her fellow Africans. And she is approaching womanhood, where greater pain and danger awaits. So when Caesar, a slave recently arrived from Virginia, tells her about the Underground Railroad, Cora takes the momentous decision to accompany him on his escape to the North.

In this razor-sharp novel, the Underground Railroad has assumed a physical form, a dilapidated...