Idk what fell apart for me, but I did not like this book that much. Maybe I just don't care enough about the characters to have enjoyed the story. I thought that Malcolm's dad was going to play a bigger role in the book, but he was more of a behind the curtain villain. I also kinda wanted Malcolm to give Rachel more crap about the way things went down in the first book. I completely understand why he forgave her so quick, because why spend precious time being mad at her when all he really wants to do is be with her. Even after he forgave her, Rachel still acted as if she was indecisive about being in a "official" relationship wit him and it drove me mad. Also, he went back to calling him a manwhore and a player when he obviously hasn't been with any women since her, so that made no sense. I did not like how judgy she was about Tahoe and Gina when, HELLO, that was Malcolm months ago and she defended him to her friends. 
 So I was disappointed in this book, but that does not mean it wasn't a good read. I still enjoyed it.