With non-technical books (literature, history, quality-of-life), most of the time will be invested into actual reading, with a bit of pondering and maybe discussing. We can have a conversation right away, and there's still knowledge and insight to be gained.
Here are some non-technical books I'd like to read:
* How to Read a Book - http://amazon.com/dp/0671212095
* Influence: The Psychology of Persuasion - http://amazon.com/dp/006124189X
* Liar's Poker - http://amazon.com/dp/0140143459
* Growing a Business - http://amazon.com/dp/0671671642
I wish more hackers took that attitude towards science books. Can't really get much out of a pop-physics book without solving problems.