In 2002, a novel thought to be the first written by an African-American woman became a best seller, praised for its dramatic depiction of Southern life in the mid-1850s through the observant eyes of a refined and literate house servant.

But one part of the story remained a tantalizing secret: the author’s identity.

That literary mystery may have been solved by a professor of English in South Carolina, who said this week that after years of research, he has discovered the novelist’s name: Hannah Bond, a slave on a North Carolina plantation owned by John Hill Wheeler, is the actual writer of “The Bondwoman’s Narrative,” the book signed by Hannah Crafts....