There is a book by Pat Shannon documenting the story of Montana Freemen. It used to be available through the Americans Bulletin Newspaper, run by Robert Kelly in the Medford Oregon area.  They also carried an excerpt of the best citations from the Voluminous Book: "Anderson on the Uniform Commercial Code", which is quite helpful to the serious student.  This last book on the UCC & the so-hard to find "Bankers Handbook" were the two main reference materials which LeRoy Michael Schweitzer & the Freemen used to shake the Commercial Foundations of the Evil-Empire of modern Babylon to its knees.  The Americans Bulletin newspaper also has a video & some computer disks from LeRoy, all similar to those avaialble here.  They also had a work-book of the Schweitzer material.
              The "American Free Press" may also have a copy of Pat Shannon's book on the Montana Freemen. Amazon is worth a check also.