The Origin of Doubt is a collection of flash fiction that represents the best of the genre. Each story is a gem, a glimpse into moments of yearning and unexpected perception, instants that many of us might otherwise miss. Nathan Long writes with a confident and assured hand, his sensibility generous and insightful. These are stories of male and female desire, of love and longing and loss. They are told to us like secrets, each simple moment a revelation that generates surprise and wonder. Reading them is sheer delight. –Patricia Smith, The Year of Needy Girls