Start with high-confidence african american plays books, then narrow by subgenre or adjacent topics.
If Beale Street Could Talk
James Baldwin
Funnyhouse of a Negro
Adrienne Kennedy
Gee's Bend
Elyzabeth Gregory Wilder
Detroit '67
Dominique Morisseau
Les Blancs: the Collected Last Plays
Lorraine Hansberry, Robert Nemiroff
Fairview
Jackie Sibblies Drury