Stephen Hren is a restoration carpenter, builder and teacher who specializes in sustainable design and solar heating technologies. He is the co-author of The Carbon-Free Home and A Solar Buyer's Guide for the Home and Office .Deborah Niemann is a homesteader, writer and self-sufficiency expert who presents extensively on topics including soapmaking, breadbaking, cheesemaking, composting and homeschooling. She and her family raise sheep, pigs, cattle, goats, chickens, and turkeys for meat, eggs and dairy products, while an organic garden and orchard provide fruit and vegetables.