This is going to bore most people to tears.. The last e-books I listened to.
Something Deeply Hidden by Sean M. Carroll. The best part is Sean talking about the emergence of space-time from underlying processes.
The Moral Landscape by Sam Harris. Listened to this twice. Spoiler alert, Sam is wrong about morality being able to be build objectively. Values create morality, this is always subjective between people, cultures, religions and eras.
The Prince by Machiavelli. Hardly needs any introduction. I read this when I was about 21 or 22. Came back to it fairly recently.