Dan Chiras has done a number of things I really like in this book.
The first part of his book provides a chapter on each of several natural building technologies with enough information to help novice readers understand what is involved. Moreover, he adds a pro and con table at the end of each to help readers compare and contrast them - and to make a decision about which is best for their particular situation.
Chiras also provides an ample helping of "food for thought" material to help potential natural builders understand the "why" of their prospective natural building projects, an essential process for anyone who is contemplating an out of the ordinary building project.
Chiras serves his readers well by acting as a "fair broker" of natural building as a concept as well as each of the technologies he presents. This allowing his readers to make their own informed judgements about which natural building method, if any, they will use. Chiras additionally provides numerous references so that readers can find more detailed material for further research and project planning.
I would strongly recommend this book to anyone who is in the process of considering or planning construction of a natural home, especially to those who are not already familiar with conventional construction materials and methods and at least reasonably familiar with natural construction alternatives.
It's easily worth the price.