The Catcher in the Rye by J.D. Salinger has been one of the most popular and influential American novels of the 20th century. Fifty years after the book was published, its teenage narrator Holden Caulfield would now be heading for retirement. But this fifties teenager is still a role model for adolescents. Novelist Richard Francis investigates why.
Rye thoughts, 50 years on: page 15