Novels from Evan Hunter's “The Blackboard Jungle” to Curtis Sittenfeld's “Prep,” movies from “Rebel Without a Cause” to “The Breakfast Club,” and countless rock ‘n' roll songs echoed Salinger's message of kids under siege. One of the great anti-heroes of the 1960s, Benjamin Braddock of “The Graduate,” was but a blander version of Salinger's narrator. __