From my library book from #5 is pic 1 and another couple on the matter one is a no hold barred German sniper on the Eastern front the Russians did not muck around with any captured snipers pretty gripping tale, I have another 18 titles on snipers through conflicts from WWI - present.
Lastly "The Last Wolf" By Cox a Marine Scout Sniper its a good read but I suggest if your interested in it you get a kindle copy as your not going to like the price of them now there is one copy on Amazon, I brought mine years ago for $100/Au.