Question: Joshua Ian "Josh" Schwartz (born August 6, 1976) is an American screenwriter and television producer, he's known for developing The CW's series "Gossip Girl" based on the book series of the same name, Gossip Girl is an American young adult novel series written by Cecily von Ziegesar and published by Little, Brown and Company, a subsidiary of which organization?
Sentence (from "Gossip Girl (novel series)"): The novel series is based on von Ziegesar's experiences at Nightingale-Bamford School and on what she heard from friends.
Relevant evidence: No