OK, I'll admit it. I've been really late in hopping on the Ursula K. Le Guin band wagon. She's been writing for quite a while and I've not been hooked on her stuff until this last summer, when I read one of her early books, The Lathe of Heaven. All I can say is, "Wow." What a gutsy book. And imaginative. And beautifully written.
What interested me, aside from the highly original story of a man whose dreams alter current reality and the doctor who uses those dreams to his twisted advantage, is how in each new reality, the man's romantic interest keeps coming back. It's as if the eddies of reality, however changed it is (and there are aliens and a volcano-splattered Portland, Oregon is some of these realities), bring her back to him.
Sounds like Twin Souls a little bit, doesn't it? (Except the volcano and aliens part, that is).
If you haven't already, treat yourself to this book.