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?

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Gossip Girl (season 4): The fourth season of "Gossip Girl", an American teen drama, consisted of 22 episodes which aired between September 13, 2010 and May 16, 2011.  The series was based upon the book series by Cecily von Ziegesar and developed for television by Josh Schwartz and Stephanie Savage.  The CW renewed the series for a full fourth season on February 16, 2010.  Blake Lively, Leighton Meester, Penn Badgley, Chace Crawford, Taylor Momsen, Ed Westwick, Jessica Szohr, Kelly Rutherford, and Matthew Settle all return as series regulars.

Josh Schwartz: Joshua Ian "Josh" Schwartz (born August 6, 1976) is an American screenwriter and television producer.  Schwartz is best known for creating and executive producing the Fox teen drama series "The O.C." which ran for 4 seasons.  Schwartz is also known for developing The CW's series "Gossip Girl" based on the book series of the same name and for co-creating NBC's action-comedy-spy series, "Chuck".

Gossip Girl (novel series): Gossip Girl is an American young adult novel series written by Cecily von Ziegesar and published by Little, Brown and Company, a subsidiary of the Hachette Group.  The series revolves around the lives and romances of the privileged teenagers at the Constance Billard School for Girls, an elite private school in New York City's Upper East Side.  The books primarily focus on best friends Blair Waldorf and Serena van der Woodsen, whose experiences are among those chronicled by the eponymous gossip blogger.  The novel series is based on von Ziegesar's experiences at Nightingale-Bamford School and on what she heard from friends.

List of Gossip Girl episodes: "Gossip Girl" is a teen drama which premiered on September 19, 2007 in the United States on The CW.  "Gossip Girl" is based on the young-adult book series of the same name written by Cecily von Ziegesar, and was developed for television by "The O.C." creators Josh Schwartz and Stephanie Savage.  The series follows the lives of the young, wealthy, and social elite residing in the Upper East Side of Manhattan, and is narrated by an unseen and seemingly omniscient character, "Gossip Girl", whose blog is widely read among the characters.

Gossip Girl (season 6): The sixth and final season of "Gossip Girl", an American teen drama based upon the book series by Cecily von Ziegesar and developed for television by Josh Schwartz and Stephanie Savage, aired between October 8 and December 17, 2012.  The CW officially renewed the series for a sixth season on May 11, 2012.  The series consisted of 10 episodes with a special retrospective, which was the shortest of all seasons.

Gossip Girl: Gossip Girl is an American teen drama television series based on the book series of the same name written by Cecily von Ziegesar.  The series, created by Josh Schwartz and Stephanie Savage, originally ran on The CW for six seasons from September 19, 2007, to December 17, 2012.  Narrated by the omniscient blogger "Gossip Girl", voiced by Kristen Bell, the series revolves around the fictional lives of upper-class adolescents living in Manhattan's Upper East Side.

Gossip Girl (season 2): The second season of the American teen drama television series "Gossip Girl" aired on The CW from September 1, 2008 to May 17, 2009.  Based upon the novel series by Cecily von Ziegesar, it was developed for television by Josh Schwartz and Stephanie Savage.

Jenny Humphrey: Jennifer Tallulah "Jenny" Humphrey is one of the characters in both the "Gossip Girl" and "The It Girl" series of novels by Cecily von Ziegesar.  She is portrayed by Taylor Momsen in the "Gossip Girl" television adaptation on The CW.

Gossip Girl (season 1): The first season of "Gossip Girl", an American teen drama based upon the book series by Cecily von Ziegesar.  Developed for television by Josh Schwartz and Stephanie Savage.  Airing on The CW from September 19, 2007 till May 19, 2008 with 18 episodes.  It tells the story of Serena van der Woodsen's return to Manhattan's Upper East Side in New York City following her mysterious disappearance to boarding school in Connecticut, while being watched by gossip website Gossip Girl.

Gossip Girl (season 5): The fifth season of "Gossip Girl", an American teen drama based upon the book series by Cecily von Ziegesar and developed for television by Josh Schwartz and Stephanie Savage.  The CW officially renewed the series for a fifth season on April 26, 2011.

Supporting paragraphs: Josh Schwartz Gossip Girl (novel series)
Answer: Hachette Group