The Dark Forest by Cixin Liu
The Dark Forest by Cixin Liu was a thought-provoking book which I think really does glimpse into the darkness of civilization, and humanity. There is some subtle optimism presented throughout the book which puts much faith in humanity’s (and other civilizations'). However, there is also a darkness which is presented which is a disturbing answer to the Fermi paradox. It is thought provoking and really makes you contemplate humanity’s place in the universe.