The book "The Fourth Massachusetts Cavalry in the Closing Stages of the War for the Preservation of the Union, from Richmond to Appomattox" gives the reader the opportunity to study in depth the events that occurred during the American Civil War. The authors, William B. Arnold, Edward T. Beauvais, and La Salle Corbell Pickett, look at the role of the Fourth Massachusetts Cavalry in the important events of the time. The book recounts the movement of the regiment from Richmond to Appomattox, detailing battles and strategic maneuvers. This is a valuable document that helps to better understand the importance of these historical events and the contribution of the cavalry regiment to the enormous effort to keep the Union united during the United States Civil War.