andrewl parent
I read Paul Theroux's book Sir Vidia's Shadow many years ago. It was just one person's account and point of view of course, but it was pretty damning as I recall.
I've read them both and Naipaul is the much better writer. Perhaps that always rankled. Anyway they "buried the hatchet" in 2011.
https://bookertalk.com/poison-pens-when-writers-friendships-...
The arc of their relationship was quite a thing to follow in real-time. Having been familiar it through both of their accounts and allusions, over years, the fact of their falling out was a mystery until this came out—and helped shore the foundation for just how disappointing humans are.