O.R 13

I have read the Gossip Girl series before, but I wasn't aware they were in a certain order. So I have decided to read them again. I just started with the first one and so far, the story has just been introducing characters left and right. Blaire, Nate, Chuck, Serena. These teens live in New York with pretty much everything they could want in their reach. As long as they keep their public image, they can have anything. Money, booze ect.. But when you can have everything, there is bound to be drama. Serena has returned from a far off school, much to the dismay of her former bff, Blaire who had Nate all to herself while Serena was gone. But now that she's back, who will he choose, Blaire or Serena?