Creation: Darwin, His Daughter & Human Evolution
Randal Keynes
The Opinion of Mankind: Sociability and the Theory of the State ...
Paul Sagar
How Many Friends Done One Person Need?
Robin Dunbar
The WPA Guide to Pennsylvania: The Keystone State
Federal Writers' Project
Half the Sky: Turning Oppression Into Opportunity for Women ...
Nicholas D. Kristof & Sheryl WuDunn