"Or"? They're all excellent and I highly recommend all of them, especially the 3 body problem series.
And honestly the killing star has aged.. weirdly. Amazing concept, seemingly written by an author with multiple personalities, one of whom just cannot shut up about the Titanic
I thought about that when I read the book. How weird to write about such grandiose ideas as interstellar travel and then go on and describe the wreck of Titanic as something marvelous and mysterious.
Has he written about Titanic in his other books too?
https://en.wikipedia.org/wiki/The_Killing_Star