"Shavetails and Bell Sharps: The History of the U.S. Army Mule" by Emmett M. Essin is a nonfiction book published by the University of Nebraska Press in 1997. This hardcover book delves into the history and role of mules in the U.S. Army, exploring their significance in military operations and everyday use. With a focus on the United States Army and the use of mules, this book provides a detailed narrative on the relationship between these animals and the military. The book is illustrated and contains 259 pages, making it a valuable resource for history and nature enthusiasts interested in this unique aspect of military history.