Consider other works by August Wilson, such as Fences and Jitney.
Also consider other plays that explore the African American experience, like Imamu Amiri Baraka's Dutchman and The Slave, and more contemporary works in the same vein, like Lynn Nottage's Intimate Apparel.
Consider works by other authors who explore similar themes, such as Toni Morrison's novels Sula and Beloved, Ayad Akhtar's play Disgraced, and Eleanor Burgess' play The Niceties.