There are hundreds of excellent resources for learning more about passive solar design. Here are a recommended few:

Books:

• The Passive Solar House by James Kachadorian
  
  
• Solar Living Source Book edited by Doug Pratt
  
  
• The New Independent Home by Michael Potts
  
  
• Independent Builder by Sam Clark
  
  
• Energy Efficient Building edited by Kevin Ireton
  
  
• Energy-Saving Projects for the Home, by Bill Henkin, Ortho Books