Hi Lee,
There are several academic
books on indigenous architecture but the web is your best bet for DYI
project and of
course finding a Elder that will show you how. As for the "Tracker School," and what it teaches, I cannot endorse there school or practices. Native cultural life skills are different than what is being taught there in many ways, and there blatant commercialization of Native teachings is a bastardization of the oral traditions of our culture, which
should only be given freely. If Tom Brown was actually taught by an elder, he would never dream of charging money for that knowledge. I sometimes make a living teaching wilderness adventure activities or primitive life skills, but never in the context of traditional teachings.
You can build a double wall structure and capture incredible thermal qualities, yes that is true. First you must share with me how big a structure you would like to build and what types of
trees do you have available to you? Will you be making your own lashing or using a store bought natural rope? (either is fine.)