"What is the book that changed your life? (not novels or religious texts)"
I think it's a wonderful way to connect in a less superficial way and learn a little more about each other. It's also a wonderful way to discover new books worth reading.
This is one of them:
The Prize: The Epic Quest for Oil
Follows the historic role of oil from the first oil well in Pennsylvania to the aftermath of the Persian Gulf War and comments on how the natural resource shaped the entire world economy and international politics in the last century.