A book of interest to librarians, since we serve our fellow humans who utilize networks to interact with us and each other:
Cognitive Surplus: Creativity and Generosity in a Connected Age, by Clay Shirky
-link to Amazon listing: http://www.amazon.com/exec/obidos/ASIN/1400116813/

-coverage on the book in BoingBoing: http://www.boingboing.net/2010/06/10/clay-shirkys-cogniti.html