Gossip Girl by Ting Dong

The Gossip Girl , by Cecily von Ziegesar , is telling the story around a group of teenagers, who live in the  Upper East Side of Manhattan in New York City. The teenagers deal with sex and relationship problems while attending elite private single-sex schools, where their lives are watched by the unseen title character who writes a blog about them. The main characters are Serena van der Woodsen, Blair Waldorf, Nate Archibald, Jenny Humphrey, Dan Humphrey, Chuck Bass and Vanessa Abrams. Throughout the books, the characters deal with problems that stem from the Upper East Side lifestyle. At the beginning of the series, Serena returns from boarding school for an unknown reason. She resumes her "best friends forever" status with Blair and her "normal" life filled with designer clothing and wild parties.