Solar Water Heating: A Comprehensive Guide to Solar Water and Space Heating Systems by Bob Ramlow, published by New Society Publishers, 2006. List price: $24.95

The Homeowner’s Guide to Renewable Energy by Dan Chiras, published by New Society Publishers, 2008. List price: $27.95

Biosiesel: Basis and Beyond: A Comprehensive Guide to Production and Use for the Home and Farm by William H. Kemp, published by Aztext Press, 2006. List price: $29.95

The Home Energy Diet: How to Save Money by Making Your  House Energy Smart by Paul Scheckel, published by New Society Publishers, 2005. List price: $18.95