Divining Light, by Ted Kosmatka

Moving on in my reading of the 2010 Nebula Award winners, my most recent read was Divining Light, by Ted Kosmatka. The protagonist is a brilliant quantum physicist, but the very study of physics has pushed him close to madness. He gets one more chance at a research laboratory, where he explores the implications of retrocausality in the classic two-slit experiment. This is really great stuff, reminding me of why I read speculative fiction. The collapse of a wave form to a particle form ends up to be used in a somewhat mundane way (detecting aliens among us). But Kosmatka's simple description of the utter weirdness of the two-slit experiment is priceless. Read it just for that. Four stars