This book may interest anyone working on Georgia Civil War genealogy (white or black):
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Clarence L. Mohr.On the Threshold of Freedom: Masters and Slaves in Civil War Georgia.Athens, GA: The University of Georgia Press, 1986.
It probably could best be used together with the 1860 Federal Census Population and Slave Schedules, supplemented with the usual Georgia genealogy resources.
I found it helpful, but be aware that some of the content can be disturbing.