Writer J.D. Salinger, age 91, author of The Catcher in the Rye, Nine Stories, and Franny and Zooey. died on Wednesday at his home in Cornish, N.H. The Catcher (1951), his signature work, was noted for its strong vernacular voice, quirky sense of morality, sympathetic portrayal of adolescence and its alienated distrust of the adult world. It quickly acquired cult status and gained Salinger a notoriety he came to despise.