"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):
"Man was born free, but everywhere he is in chains." Thus begins Rousseau's influential 1762 work, in which he argues that all government is fundamentally flawed and that modern society is based on a system of inequality. The philosopher proposes an alternative system for the development of self-governing, self-disciplined citizens.