Don't be angry ... Most people live inside a cage of their own expectations. It makes them feel safe. The world's a frightening place full of glory and wonder and, as we've both discovered, danger. Flying isn't for everyone.
This comment speaks to the tendency we all have to create cages of our own that protect us from anything different or new. It is the cause of much fundamentalism and sectarianism. As Christians, we need to take the risk of "flying" and facing the dangers and glories of reality even if it means having to modify what we believe or expect.
The Sea of Trolls is a thoroughly enjoyable yarn that is highly informative about times and places that existed long ago but still have an influence on the way we think today. It should provide lots of opportunities for parents and teachers to discuss religious belief, myths and legends, friendship and loyalty, the relationship of humans to nature, and the history of the time and place. I thank my teenage daughter for recommending it to me!