I thought this was a really bold story and I loved the melding of Chinese mythology tradition with Christianity. It is a book that will have its struggles because of its openly Christian slant, but the discovery of self is the true heart of the story.
There are several ways this could be taught, beginning with the medium of graphic novel. Students could create their own or at least blocks of story. Another is in a "coming of age" unit that looks at how Jin grew into himself. Allegory is highly present and this could be a great book to teach that technique also.
I think every student could get something out of the message of being who you are and would highly consider using this in a classroom.