The Chronicles of Narnia is one of my favorite books... I think you did an excellent job of capturing the raw beauty of it. I have little to say... transitions are essentially flawless, orchestration and instrumentation is perfect. I only wish you used some better virtual instruments. The ones used now are fine, but there are more powerful ones out there.
The battle is perhaps my favorite part, albeit short... it has that cinematic-orchestral feel we all strive for. I just wish the transition to the ending were a bit more... the death of the piece before the ending seems strange. I would have repeated Aslan's theme once more before the final chord, just for good measure.
Another great piece, keep up the good work. :)