Wow. Just, wow.
Oh, and the last word? This BBC interview was correct; the last word isn't "scar". It's ... well, the last word in the book (or at least the Scholastic hardcover) is "Biola" (Angela Biola being the Manufacturing Director, as listed in the colophon).
As for the last word in the narrative - let me share what came to my mind when I read it. It's the coda to a piece I've sung several times in choir, "Julian of Norwich":
All shall be well, I'm telling you,
Let the winter come and go.
All shall be well again, I know.