Human existence is way to complex to be expressible explicitly, in a form of non-fiction book. Hence, humans have always used storytelling to convey the concept which are difficult to put into words otherwise.

My favorites: - "East of Eden" by Steinbeck

- "Map and Territory" Michel Houellebecq (especially recommended to tech crowd/founders, as it is about alienation of a modern creator). "Platform" and "Atomised" are also fantastic - the guy is potentially the greatest living writter today.

- "From Here to Eternity" James Jones

- the big ones by Dostoyewski