The on line issue of American Rifleman has a review of "Sharpshooters of the Civil War", consisting of eight chapters of a larger book of wider scope by Plaster. Her's the site. Stan
http://www.americanrifleman.org/articles/BR-CivilWar-Sharpshooting/?utm_source=newsletter&utm_medium=email&utm_content=Civil-War-text2&utm_campaign=SEALS