"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):
The terrorist attacks of September 11, 2001, gave birth to a generation of leaders forged not in classrooms through hypothetical training, but on the front lines of war through hands-on experience. U.S. Navy SEAL Teams were at the forefront of this transformation, emerging from the triumphs and tragedies of war with an understanding of leadership in the most challenging environments. Jocko Willink and Leif Babin are just such leaders - highly decorated Navy SEAL officers who served together in some of the toughest combat of the Iraq War. Together, they developed leadership lessons and organizational practices through years of experience, alongside heroes such as sniper Chris Kyle. They took these lessons and helped write doctrine for the next generation of SEALs as BUD/S instructors. Today, Babin and Willink apply these principles in the boardroom via their company Echelon Front. Across the country, they demonstrate how the SEAL approach to leadership that made them successful soldiers can help countless organizations and individuals achieve the highest level of success.With Extreme Ownership, their proven plan is available to everyone, with lessons that include: Extreme Ownership: Take it upon yourself to push harder and improve, Check The Ego: Operate with a high degree of humility by admitting mistakes and taking responsibility, Cover & Move: Have each other's back and work together to accomplish the mission and much more.