Ask HN: Interesting (Non software) books?

Einstein's Dreams. Written by a physicist. A great fiction on the nature of how time could be. My favorite example from the book is about how one scenario says that time slows as we go up the mountains and most people stay there to preserve their youth and when they go down to the foothills, they go there for work!

A great way to get into history is Thomas Cahill's "Pillars of History" series. Start with "How the Irish Saved Civilization" and if you like it, carry on with the rest of the series.