Bill Steen is a photographer and collaborative builder who is especially interested in combining building techniques with community-enhancing approaches to design. Athena and Bill are co-founders of the Canelo Project, through which they conduct ecological design and construction workshops in the U.S., Canada, and Mexico. They live in Canelo, Arizona. Visit Athena and Bill's Blog, The Canelo Chronicles at www.caneloproject.com. David A. Bainbridge first worked on community design, passive solar heating and cooling, building codes, and solar rights at the innovative design firm Living Systems. He described his first water-wall solar home and the Village Homes solar subdivision in Solar House Designs in 1978. Founder of the Passive Solar Institute, and recipient of the ASES Passive Pioneer Award in 2004, Bainbridge consults on a wide range of residential and commercial projects and has completed several solar projects on his own homes, as well as co-authoring The Straw Bale House (with Athena Swentzell Steen and Bill Steen), and Passive Solar Architecture (with Ken Haggard). He is currently Associate Professor of Sustainable Management at the Marshall Goldsmith School of Management. He lives in San Diego, California.