NEW YORK - Not everyone believes that Philip Roth has written his last book.
Among the skeptics: Livia Manera Sambuy, co-director of an upcoming PBS "American Masters" documentary about the prize-winning novelist.
"Philip Roth: Unmasked" features extensive interviews Sambuy conducted with Roth, who turns 80 this month, along with commentary from such friends as Mia Farrow and admiring authors such as Jonathan Franzen and Nathan Englander. The film will air March 29 on PBS stations but also has a weeklong theatrical run - admission is free - starting Wednesday at Manhattan's Film Forum.
The documentary outlines his life and work, from his childhood in Newark, N.J., to such controversial novels as the ribald "Portnoy's Complaint" to his current status as literary eminence and perennial Nobel candidate. But "Unmasked" leaves out Roth's news-making decision, which he revealed last fall, to stop writing novels. He is presented as an active writer, with shots of him at work in his Connecticut home.
Roth not only says nothing about wanting to retire, but declares he would be miserable if he did.
"I keep doing it. I never quit," he says. "My worst times are when I'm not writing. I'm prone then to be unhappy, depressed, anxious, and so on."
Through the publication of "Nemesis," which came out in 2010, Roth had been dependably turning out a book a year. But he released no new work in 2011 and by last fall had informed the French magazine Les inRocks that "Nemesis" was the end. A wave of reports followed, and Roth has said he is relieved and delighted to be done.
"Someone should have told me about this earlier," he joked about his retirement during a discussion in January with the Television Critics Association.
In a recent email interview, Sambuy acknowledged that she and friends of Roth knew during filming that he had decided to quit. Although the voluntary silence of a celebrated, apparently healthy writer is rare in literary history, Sumbuy said "no one imagined" it "would be such big news." And she doesn't think he's really given up.