"The 21st Century Sniper"
Another book I'd wanted to review for a time (the snakebite did slow me down a bit) -- The 21st Century Sniper, by two former SEALS, Brandon Webb and Glen Doherty. It traces the history of sniping and then gets into modern tools (including the .50 BMG and its smaller but still enormous cousins), thermal imaging, ballistic computers, and a big chapter on suppressors and their use. (As the authors note, if OSHA was in charge of firearms, suppressors would be mandatory). Available on Amazon.