Every week, I ask my friends, colleagues, and acquaintances that are part of my social networks (Twitter and LinkedIn) a simple question:
"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):
Understanding Computers and Cognition: A New Foundation for Design
This volume is a theoretical and practical approach to the design of computer technology.