I started reading The Fox Woman by Kij Johnson. I read for perhaps half an hour before turning off the light and going to sleep. The next morning I awoke with all sorts of memories about elegant Japanese gardens gone partly wild, about foxes transforming into people, about magic and desire.
In fact, I had memories of far more events than were the book. There was something about the language and the setting that fed straight into my dreams, and all night my sleeping self continued to explore that world. Pretty sweet!