When I lived in Chicago, I helped write a couple books... There is something to be said about the experience of completing a book and I'm proud to have contributed to that. The process allowed me to meet some really interesting people and learn a ton from them. Furthermore, the messages and impact of these altruistic projects have had a tremendous effect on the way I think and the person I am.
A Decade of You Are Beautiful by Matthew Hoffman
The Leap Year Project by Victor Saad