There were two things going on: 1) I had already established in my own mind where I wanted to go with the next series, and having James around as a Grey Eminence would have complicated matters. He had had an amazing life and it was time to bid him good-bye.
My favorite part of a roller-coaster ride is when you're going up and you're slightly scared and really excited. You don't know what's coming next but you know it's going to be good. You can't handle it, go on the carousel.