Well in this section of the book, there isnt really any mystery. Its basically, highschool drama.
There is this character named Matt, and he has a girlfriend named Lise. She is basically got him whipped. He tries to help her out, like when Chloe who is the main character and Thomas, her new boyfriend and Matt, and Lise, and Daria. Go out to eat at a resturaunt in the town right next to them, Lise sees her dad with someone she hates and she runs out on the streets and starts (in my words) Rampin out. Which means like freaking out or something along those lines.
Right now, the central conflict I think, would probably be how Chloe and Matt are not friends. She went to peters house to help out his mom, and his mom said that his friend Matt came over to get some astronomy tapes. Apperntly he likes astronomy and dosent want anyone to find out. So, now knowing that Chloe goes to Matts because hes driving to Morrisville. His mom tells Chloe that he is downstairs and should go see him, so she does. He scrambled when he found out it was Chloe, he thought it was Thomas at first,he didnt want anyone to know that he was watching astronomy tapes. They get into a argument basically, then Matt dosent talk to her at all, all night.
I also think that Matt could have killed Peter by pushing him off the edge. I think that because Matt wantedd his astronomy tapes apparently, and he knew if he was caught asking him for some. His social life would be trash, I think that is a little extreme for some astronomy tapes. But you never know. Kids these days…
The author has changed the conflict around a lot lately. They have been making conflict between like every character. Its almost hard to keep track of anyone who isnt fighting or mad at. Lise is mad at Matt,Daria is mad at Chloe,Matt is mad at Chloe, Lise is also mad at Chloe. Unless they have grown a secret friendship.
I honestly dont think the characters changed that much from the start of the book. Except for Peter, now being dead. Chloe, has kind of changed, I mean she has a boyfriend now, and hangs out with all of his friends. That is change, very small but its a change.
I really dont like that the author didnt really tell us what the characters look like. I like to imagin what they look like. Example, Peter to me looks like a hunched over guy who wears a pocket protecter, and also tucks his shirt into his pants, and has Orange poof afro hair but its like pushed back so he has like no bangs, and he also has some crazy think glasses.

I like the way you described the book. I guess. The only thing I saw was that you still haven’t told us the name of the book. What is it!
Peter must be a really weird character if you think of him like that. Why would Peter push him off the edge of something? He didn’t like his hair?