The author himself started with a $50 version and added a $500 addition in 1975 where he still lives and works promoting his book. Also tells how to build root cellars and greenhouses, deal with building codes, solve drainage problems, and get the maximum light air, and views. " The author should be given an award for proving that an energy-efficient house is only as expensive as you want it to be" - Workbench.
Author: Mike Oehler, Illustrated by Chris Royer 1978, revised edition 1992 115 pages
The $50 and up Underground House Book 
The author himself started with a $50 version and added a $500 addition in 1975 where he still lives and works promoting his book. Also tells how to build root cellars and greenhouses, deal with building codes, solve drainage problems, and get the maximum light air, and views. " The author should be given an award for proving that an energy-efficient house is only as expensive as you want it to be" - Workbench.