The 'Tree' of Us: Richford Boys Who Changed The World And What They Left Behind, is Charles Yaple's third book dealing with humans and their relationship with the land. The 'Tree' of Us... has been described as:

a deeply personal narrative mixing biography, history, and memoir to encourage the furtherance of a land ethic as envisioned by famed ecologist Aldo Leopold.  The story follows the lives of three men, from the steeply forested hills of Richford, New York, who changed the world. Readers will quickly connect with the discussion about John D. Rockefeller, once the world’s richest man.  Gurdon Wallace Wattles, the second world changer and friend to five U.S. presidents is less known. The third Richford native followed a less publicly known path and the reader is left to decide about his impact on the world. The course of each life is instructive, particularly to those seeking a measure of happiness and a wish to leave behind a planet enabling others the same opportunity.