Deep Work
Cal Newport
Focus etc.
Epistulae Morales ad Lucilium
Seneca the younger
Ethics and stoicism.
The Truth
Neil Strauss
The uncomfortable truth about relationships. Opposite of "The Game".
The Travels
Marco Polo
Mindshift
Dr. Barbara Oakley
Methods for learning - Barbara learned languages, then later applied the same techniques for learning engineering stuff.
The 4 hour chef
Tim Ferriss
About learning anything. (And also cooking)
The 22 immutable laws of marketing
Al Ries and Jack Trout
Recommended by Tim Ferriss
So Good They Can't Ignore You
Cal Newport
Build skill capital.
The Life Changing Magic of not Giving a Fuck
Sarah Knight
Don't give a fuck, but in a funny way.