The theme of the book Shift ,by Jennifer Bradbury is to learn to let go of your friends.
There are 2 friends that go on a trip.But one of them runs away in the middle of the trip.
The bad thing Chris needs to do is let go of win. They made this trip since they were going to go to different colleges after the summer.The punishment for not letting him go is Win running away without telling chris. Chris had to go by himself at the end trip. Win said that if he told chris ,chris would've made him stay. If chris didn’t worry about win so much and let him go Win could of told him the truth and Chris wouldn't have been so stressed, and waste so much time. Now we come to how he fixed the bad thing. At the end of the book he finds win in a barn. They talk for a while. Then chris suddenly knows that he doesn’t need him. Because he knows that , Win could tell him everything and chris wasn’t stressed.
The reward was Chris not being stressed. If he didn’t realize it at the end. Win still wouldn’t have told anything. Last quote of the book- He didn’t need Win or the pictures, But they’ll be there for a reminder. Both of them. This proves the theme is let go of your friends.