Here's the bib info for books that present the idea of the third place that we've talked about here, and in the Scan.
1. Better Together: restoring the American community by Robert Putnam and Lewis M. Feldstein, with Don Cohen (New York: Simon & Schuster, 2003) This one has a chapter on the Chicago Public Library
"Better Together tells the stories of twelve different groups: from a community organization to a church, as well as a dance group and a web site, from a union to a branch library, a Fortune 500 corporation and a neighborhood group, to name a few. The stories hold in common the building up of community, of social capital. It is the best book of general interest that I have read in more than a year." (Amazon reviewer's comments)
2. Celebrating the Third Place: Inspiring Stories About the "Great Good Places" at the Heart of Our Communities. by Ray Oldenburg (Marlowe & Company; January 9, 2002)
3. The Great Good Place: Cafes, Coffee Shops, Bookstores, Bars, Hair Salons, and Other Hangouts at the Heart of a Community. by Ray Oldenburg (Marlowe & Company; 3rd edition August 1, 1999)