The Catcher in the Rye has been controversial since its publication in 1951 due to its explicit language and open treatment of sensitive topics. The protagonist, Holden Caulfield, has just been expelled from boarding school and spends three days in New York City feeling disconnected from others and disgusted by what he sees as phoniness in the adult world. By the end, with his sister's help, Holden comes to accept that childhood innocence cannot last and the imperfections of the adult world cannot be avoided.