The book's final lines, which are all I remember:
"You mean, all this time I've been part of a sideshow?"
"Yes," she replied coolly, "but if I were you I wouldn't dwell on it."
Thus I awoke, and realized that I hadn't written that book at all, though perhaps I had lived it. Then I drifted back to sleep, and as I did so I remembered another unpublished novel that I really had written quite recently. Then I woke again and realized that that one wasn't real either. Sigh...