E. saw the movie first, but the 'His Dark Materials' trilogy by Philip Pullman really should be read. The first in the series is The Golden Compass and E. likes it very much. Here is a good HDM quiz. Themes: Be self reliant, loving toward other people, loyal. Again the power of truthfulness, loyalty, and individuality are central. (Golden Compass seems to us anti-authorian, rather than anti-Catholic, but be aware there is controversy about this.)
Here is an excellent Golden Compass lesson plan guide from Scholastic Books with emphasis on symbolism. Here is the lesson plan on characterization in the book.