"Size isn't so hard," says Lightning.

"It's not divided up like that, mostly. Colors are always easy, swaps are easier than transfers, anything with souls is the hardest, it's easier to swap between more similar things - that's why mice and not frogs most of the time and why I had to drowse the frog for Lightning - anyway it hadn't actually occurred to me that we could just not go home, but I guess we could stay, couldn't we?"

"We have families," Lightning objects.

"They'll live."

"I want to see mine again!"

Holly sighs. "And Lightning takes Book wherever he goes so we're going home, I guess, but maybe not right away, it's interesting here."