"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 Go-Giver: A Little Story About a Powerful Business Idea
A business parable in the tradition of The One Minute Manager explains how to achieve professional success and personal fulfillment by prioritizing the needs of others, in an inspirational tale that introduces a young protagonist to five business principles as imparted by a series of mysterious teachers.