I finished this one a couple of days ago, and, I must confess, I did not see the twist coming. This is one the kids will want to read again to see if there are clues they missed.
While I was waiting in the counselors' suite before the Christmas break, I met a student I did not know, and we had a conversation about his dislike of reading. I took that as a personal challenge. I spent a couple of days thinking about it, and then took a couple of books to him that I thought he might enjoy. He promised to read one of them over the break, and I'm looking forward to hearing his reaction next week.