Coyotlviejo,
When it comes to the Great Basin and the Desert Southwest, I agree that it is hard to beat Olsen. For the benefit of those who have not read his writings, his material is based upon what worked for thousands of years before the arrival of Europeans. He doesn't start with what kind of survival kit you should carry, he bases his work on what to do if you were dropped in one of those regions with nothing at all. The more time you spend outdoors with minimal gear, the more you see how good Olsen really is.
Although Olsen wouldn't be my first recommendation for jungle or arctic survival reading, a lot of the principles carry over to climates other than the Great Basin and Deserts.