Everything you need to understand or teach Torch by Jill Paton Walsh.
The value of hindsight is extremely important in Jill Paton Walsh's Torch.
For instance, it becomes apparent only after one is thoroughly into the book that what the children are toting around the world is the torch that is used to start the Olympic games.
Industrial civilization has long ago been destroyed when two children, Cal and Dio, are sent up the mountain of Olim to get the required blessing of the old...