I guess if you wanted to start somewhere, this isn't a bad place to start...if you are interested in getting a little exposure to the green/sustainable world, check it out. As much publicity as "green" has received in 2007, many people I talk with think "going green" means painting their house like Kermit the Frog. There remains a huge untapped market for green products and services. Anyway, this dummy book covers the basics about building methods, energy systems, heating and cooling, etc. Available at Amazon.com.