The Underground Railroad by Colson Whitehead:
Ethel thought a slave was someone who lived in your house like family but was not family. Her father explained the origin of the negro to disabuse her of this colorful idea. Some maintained that the negro was the remnant of a race of giants who had ruled the earth in an ancient time, but Edgar Delany knew they were descendants of cursed, black Ham, who had survived the Flood by clinging to the peaks of a mountain in Africa. Ethel thought that if they were cursed, they required Christian guidance all the more.