What's fascinating about the Unicorn Chronicles is how each book is -- a thing an order of magnitude more than the book before: from a slender middle-grade thing, to a not-so-slender middle-grade thing, to a thicker almost-YA thing -- only it's not just about length or genre, but somehow about depth and breadth of story, too.

I adored all of them, and I adored them in I think different ways. There's a progression going on here.

Book 3 (Dark Whispers) was one of my favorites last year. I'm very curious where Book 4 (The Last Hunt) is going to take all the threads from the first three.