"Green to Gold: How Smart Companies Use Environmental Strategy to Innovate, Create Value, and Build Competitive Advantage" by Daniel Esty & Andrew Winston

"Natural Capitalism: Creating the Next Industrial Revolution" by Paul Hawken & Amory & Hunter Lovins

"Cradle to Cradle: Remaking the Way We Make Things" by William McDonough & Michael Braungart

"The Ecology of Commerce: A Declaration of Sustainability" by Paul Hawken

"Harvard Business Review on Green Business Strategy"

"Making Sustainability Work: Best Practices in Managing and Measuring Corporate Social, Environmental and Economic Impacts" by Marc J Epstein, John Elkington, and Herman B Leonard