What is your favorite book from the "Chronicles of Narnia" serial?

Mine is "The Voyage of the Dawn Treader." I like how it centred around Lucy and Edmund mainly. (I always thought Peter and Susan were a little straight-laced and boring) and I was impressed with how Edmund had matured, not nearly as spiteful as he was in "The Lion, the Witch and the Wardrobe." Now I'm looking forward to the movie version of this book.