Roza Shanina: Russian Sniper by Robert Corrigan

It is the spring of 1945, and the Nazis are eliminating all the witnesses to their horrible crimes, including Jews and foreigners remaining in the prison camps. Kommandant Repp, who is known as a master sniper, decides to hone his sniping abilities by taking a little target practice at the remaining laborers in his own prison camp. But one man escapes and becomes the key to solving the mystery of the cold, calculating Kommandmant Repp and his plans for ending the war.