Writer Ralph Ellison, Monstrous?

I learned a couple of startling things about the African-American author Ralph Ellison (1913-1994) in a "By the Book" Q & A interview in the New York Times Book Review (July 25, 2021).

The interviewee, Eddie S. Glaude Jr., a professor at Princeton and the author of Begin Again: James Baldwin's America and Its Urgent Lessons for Our Own (Crown, 2020), had this to say about Ellison: "I loved Ralph Ellison....But after reading Arnold Rampersad's biography of Ellison, I despised the man. The way he treated his mother, his betrayal of [writer] Albert Murray--monstrous."

I own two review copies of Ralph Ellison: A Biography by Arnold Rampersad (Knopf, 2007). I never got around to reading the book. After seeing that quote from Glaude, I intend to start reading it soon.