From a Spring 1989 Japanese magazine called "Comtemporary American Stories" there's a series of articles called "Contemporary American Writers at Work" featuring Jay McInerney, Ethan Canin and Dad.
This was after The National Geographic Society book came out (in 1987) and before Close Encounters of the Fourth Kind ( 1995). At the time he was working on a non-fiction book about incest that would never get published.
He is seen in the top photograph, with cigarette in hand, sitting at his old desk at the Union Street house. I've never seen photographs of him smiling so nicely.