Author Tom Harmon has spent much of his life researching, collecting, working with, and championing Montana agate. With this 4-book bundle, you can access the complete collection of insightful and popular references, written by Harmon, about the many aspects of Montana agate. 

The bundle includes "The River Runs North," "The How-To's of Cabbing and Carving," "The Many Faces of Montana Agate Collections," and "The World of Dendrites in Agate."