The Three-Body Problem by Cixin Liu
The Three-Body Problem is hard science fiction, in that there's a lot of science involved. I don't know where I originally heard about it, probably some "best of sci-fi translations" list, but it's won a fair number of awards and is thoroughly enjoyable. It's also hard to talk about without giving away spoilers. But should I worry about that when the blurb itself, not the one above but the official blurb, gives it away too? Do you like spoilers? Do you hate them? They don't bother me and I honestly sometimes search for them, but I know not everyone feels that way.
The story starts off during China's Cultural Revolution. Ye Wenjie's father is killed by the Red Guard and she is eventually shipped off to a remote mountaintop where a government-sponsored group is secretly exploring the possibility of electronic communication with aliens.
Flash forward to the present. Wang Miao, a nanotechnology researcher, has begun seeing a countdown clock...