Gossip Girl it Had to You Prequel

I enjoy this book because it talked about the year and summer before the first gossip girl book. I am glad I read the other book first because it helped me understand it easier but I sometimes I forgot when I was. It followed the lives of all the characters from the gossip girl but it also included Vanessa's story which it doesn't really elaborate on in the first book.
       It talked about Jenny and how her boobs got some big. Blair and Serena's love triangle and the reason why they were drifting apart even before boarding school. They are both in love with Nate. Nate likes to smoke pot, Vanessa is in love with Dan, and Dan is obsessed with Serena to a stalker level. It also talked about Dan's dad and how much more weird he is then in the TV series which I actually prefer. It didn't really talk about Chuck either. He was only in a few scenes.