If not for a horse, would Alexander have been the Great? William, the Conqueror? Richard, the Lionhearted? If not for their awesome mounts, would the Spaniards have had their way with the New World? Would Paul Revere have spread the word? Would the West have been won?

It is hard to comprehend how far horse power has carried us, difficult to imagine, in our era of mechanical wizardry and speed, what role the horse has played in shaping human history. This is the challenge Juliet Clutton-Brock takes up in her book, a splendid blend of natural and social history that recounts the horse's story as it has figured in—and transfigured—our own.

By drawing on biological, archaeological, and historical evidence, Clutton-Brock describes the wild horse and the wild ass, from their widespread distribution at the end of the last Ice Age to their near extinction today. She shows how these beasts, once hunted for meat, were drafted for work and domesticated as humans began to grasp the possibilities of riding horseback. This discovery, with the speed, distance, and power it offered, transformed the course of history. This elegant tale of the horse and donkey, wonderfully written and handsomely illustrated, revives the true meaning of "horse power."

A study of religion through the lens of Peter Shaffer’s play Equus.
 
In Unbridled, William Robert uses Equus, Peter Shaffer’s enigmatic play about a boy passionately devoted to horses, to think differently about religion. For several years, Robert has used Equus to introduce students to the study of religion, provoking them to conceive of religion in unfamiliar, even uncomfortable ways. In Unbridled, he is inviting readers to do the same.
 
A play like Equus tangles together text, performance, practice, embodiment, and reception. Studying a play involves us in playing different roles, as ourselves and others, and those roles, as well as the imaginative work they require, are critical to the study of religion. By approaching Equus with the reader, turning the play around and upside-down, Unbridled transforms standard approaches to the study of religion, engaging with themes including ritual, sacrifice, worship, power, desire, violence, and sexuality, as well as thinkers including Judith Butler, Sigmund Freud, Karl Marx, Friedrich Nietzsche, and Jonathan Z. Smith. As Unbridled shows, the way themes and theories play out in Equus challenges us to reimagine the study of religion through open questions, contrasting perspectives, and alternative modes of interpretation and appreciation.