Three books I enjoyed this year:

this census taker, China Mieville

To Say Nothing Of The Dog, Connie Willis

The Possibility of an Island, Houellebecq

If you enjoy science-fiction, it is quite possible that you wouldn't enjoy any of the books above or even classify them as science-fiction (I would though) -- so definitely look them up or try the kindle sample to see if they appeal to you.

Also, I see Ann Leckie's Ancillary trilogy mentioned elsewhere, I second that recommendation.

[Also, honourable mention to the TV show Westworld -- if it were a book I would have included.]