Becky Bee - a pretty good authority on cob building has made the major portion of her cob builders book available online. She also wants to share the knowledge. FREE
http://www.weblife.org/cob/
(http://www.weblife.org/cob/images/cob_cover_medium.jpg) :)
Note, you can also order printed copies directly from her -It has additional information ---- good response time- I ordered 10. Link Below
http://www.cpros.com/~sequoia/handbook.html