Silke Helfrich (Germany) is an author and independent activist of the commons. She is founding member of Commons Strategies Group. She was regional representative of the Heinrich Böll Foundation in Mexico/Central America for several years, and was the editor of Wem gehört die Welt, and translator and editor of Elinor Ostrom: Was mehr wird, wenn wir teilen. She blogs at http://commonsblog.de.
Or go to Central Books & type in "Wealth of the Commons"