This is a literary discussion of one-half of Zane Grey's Westerns, with a chapter for each selected book. The choices stem from wishing to best show the broad scope of this one-time best-selling author's interests in the West. My expository treatment explains how these novels "work," while pointing out Grey's ecological concern for our natural world--its vastness, color and beauty. Wild nature provides a powerful setting but is a determinant of action and of character too.