Not only does she employ solid, believable narrative and poignant characters, but also one of the best examples of a frame story I've seen. English teachers will love it.
I warn you, however, it does deal with mature subjects--the death of a younger sibling and the mourning process that follows--but does so in such a sweet and gentle voice that readers are completely captivated. Although heart-wrenching at times, this is a story of redemption, healing, and love. If they're mature enough, I highly recommend it for younger readers.
Estimated Reading Level: 5th grade +