Fifty-six million years ago the earliest equid walked the earth, and beginning with the first known horse keepers of the Copper Age, the horse has played an integral part in human history. Combining fascinating anthropological detail and incisive personal anecdotes, Susanna Forrest draws from an immense range of archival documents as well as literature and art to illustrate how our evolution has coincided with that of horses. Forrest also relates her own experience in the field, traveling the globe to give us a diverse, comprehensive look at the horse in our lives today, from Mongolia—where she observes the endangered takhi—to a showhorse performance at the Palace of Versailles, and a polo club in Beijing to Arlington, Virginia, where veterans with PTSD are rehabilitated through interaction with horses.