"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:
With liberal democracy embattled, public discourse grown toxic, family life breaking down, and drug abuse and depression on the rise, many fear what the future holds. In Morality, respected faith leader and public intellectual Jonathan Sacks traces today's crisis to our loss of a strong, shared moral code and our elevation of self-interest over the common good. We have outsourced morality to the market and the state, but neither is capable of showing us how to live. Sacks leads readers from ancient Greece to the Enlightenment to the present day to show that there is no liberty without morality and no freedom without responsibility, arguing that we all must play our part in rebuilding a common moral foundation. A major work of moral philosophy, Morality is an inspiring vision of a world in which we can all find our place and face the future without fear.