My favorite book is titled MILITARY COMMISSION TO EUROPE in 1855 AND 1856, Report of Major Alfred Mordecai of the Ordnance Department. It is a report to the House of Representatives in 1861and is an extensive study of the artillery and tactics in Europe at that time. Also, I have one titled GUNS, an Illustrated History of Artillery, By Edita Lausanne, published in 1971. Both of these books have many useful illustrations and diagrams.