Perfect is the third novel in the Pretty Little Liars series. In this book, it talks more about Aria dealing with family problems and boyfriend issues, Spencer dealing with family and academic issues, Hanna continuing to deal with her bulimia and she has some issues going on with her best friend, and as for Emily she stuggles to keep her sexuality identity a secret, but one thing all the girls have in commom with each other is trying to figure out who Alison's killer is, and figure out who is A.