"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 full list is here):
Alexander Hamilton, James Madison, John Jay
Hailed by Thomas Jefferson as “the best commentary on the principles of government which was ever written,” The Federalist Papers is a collection of eighty-five essays published by Founding Fathers Alexander Hamilton, James Madison, and John Jay from 1787 to 1788, as a means to persuade the public to ratify the Constitution of the United States.