Check out this interview with the author to gain a better sense of Ellison's thoughts on race in America.
"King of the Bingo Game" was later published as part of a short story collection by Ellison entitled Flying Home and Other Stories. Go here if you want to see what The New York Times thought of it and how "King of the Bingo Game" fits into Ellison's broader work.
This PBS website features a biographical essay, career timeline, and other useful information about the author.
This website features interviews with those close to Ellison, helping us paint a better portrait of the author and the influences on his work.
A good resource if you're hoping to do further work on Ralph Ellison.