I think hannah get kidnapped によって Lucas. Also I think that A is a group. Jenna, Luke and Mona. Allison was not kind to them. Jenna, Mona Lucas and Allison are going to hate. woods and its something very unpleasant about it. Kill her. but the book says that A is only Mona. who knows?
Some entertainment websites such as ENews または EW 発言しました that is would be a ファン お気に入り but not one of the four girls. Unfortunately I think it might be Lucas または Toby. I 愛 both of them tho, so I really hope its neither of them.