I've called it my my orphan book - the one I struggled to write because I wanted to get to the one after it. This one was in the way, and it was too fragmented, and too disconnected, with too much needing to be done.
But I couldn't get to the one I wanted to write until this one was written. And then something happened in the struggle: the orphan book became my personal favorite. New characters emerged, new story lines developed, and new scenes erupted right on my computer screen.