Killing’s not all that bad, once you get used to it. That, in part, is the message of Patrick Hennessey’s book, The Junior Officers' Reading Club. It’s a war memoir, but one that takes the 26-year-old’s time as a captain in the British Army, in Iraq and Afghanistan, and turns it into something far more vivid than the oily gun-porn of modern thrillers, or any number of technocratic analyses by foreign correspondents. It’s a book that examines what it is actually, really, properly like to be young and sentient and killing people on behalf of Her Majesty the Queen in the early 21st century, a lifestyle chosen by around 100,000 young Britons. War isn’t “hell,” it concludes. Intense, wearying, emotionally rattling, yes, but also—just maybe—the best 18- to 30-month holiday you’ve never been on.