Where did you get the idea for your most recent book?
I usually "see" several books ahead, so, while I'm, say, writing Book 6 I see Books 7, 8, 9 &10. Sometimes farther. So I've had the ideas for everything I'm working on for months or years. For new things, I usually get inspired by a dream, some music, or some random comment. Ideas are a dime a dozen, and I have more of them than I'll ever have time to write. Making the ideas mean something and come out right on the page? That's what matters.