Unlike Richard Matheson's other novels of frontier fiction (Journal of the Gun Years, The Gunfight), Shadow on the Sun is a horror novel set in the Old West. The book begins with an Indian agent negotiating peace between Apaches and the U.S. Government, before introducing a supernatural creature out of Indian legend bent upon survival whatever the cost. As a result, I got two stories for the price of one. Like The Gunfight, the author first creates an atmosphere full of hope and future promise, then chapter by chapter, slowly lowers that future into a lake of quicksand. The contrast between the main characters--the Indian agent and the Washington D.C. bureaucrat--are excellently drawn, but it is the growth of the bureaucrat--from skeptical adversary to heroic friend--that is the heart of the novel. Despite the suspenseful build up, the climax of the story seemed rushed with an ending more fitting to a short story than a novel. Nevertheless, Richard Matheson delivers another entertaining novel.