Three years after his death at ninety-one, J.D. Salinger remains our most mythic writer. The Catcher in the Rye (1951) became an American classic, and he was for a long time the writer for The New Yorker. Franny and Zooey and Raise High the Roof Beam, Carpenters introduced, by way of the Glass family, a new type in contemporary literature: the introspective, voluble cast of characters whose stage is the Upper East Side of New York. But fame proved a burden, and in 1963 Salinger fled to New Hampshire, spending the next half century in isolation. Beller has followed his subject’s trail, from his Park Avenue childhood to his final refuge, barnstorming across New England to visit various Salinger shrines, interviewing just about everyone alive who ever knew Salinger. The result is a quest biography in the tradition of Geoff Dyer’s Out of Sheer Rage, a book as much about the biographer as about the subject—two vivid, entertaining stories in one.