The first is what got me hooked, and back into reading.
The Wages of Humanity, is a short story by Liu Cixin. The short story used to be available by itself on Amazon, but now it's been disappeared. It can be found as the last story in The Wandering Earth: Classic Science Fiction Collection.
An assassin is being offered exorbitant sum to kill the three poorest people for some reason, and the book explores why, to a thrilling conclusion.
Since I found it as a stand alone story I cannot comment on the rest of the books in that collection. From there I read into The Three Body Problem, and Dark Forest by Liu Cixin; first two books of the Remembrance of Earth's Past trilogy. The only reason I don't mention I have not (yet) finished reading the third book.
 This link now returns a 404: https://amazon.com/dp/B00CSW0UZI but it's what the URL my Kindle points to. Search does not find the stand alone edition.
Get dozens of book recommendations delivered straight to your inbox every Thursday.