Most spy novels dazzle readers with car chases and high-tech gadgets. B.W. Leavitt’s How to Train a Spy takes a darker path, peeling back the layers of espionage to reveal its most disturbing casualty: the human mind. Leavitt's book is about former Army Sergeant Brian Lewis, a committed family man, as he's recruited into a covert government program meant to build the world's greatest operators. The twist? Suppose Brian is going to be the ultimate spy. In that case, he'll have to leave behind his family, his name, and eventually himself. Throughout the book, Brian undergoes brutal physical and psychological conditioning. Sleep-learning programs feed him new languages and strategies. Virtual reality missions simulate his death over and over, rewiring his fear responses. Each step strips away pieces of the man he used to be. After his makeover, readers are left wondering: Is there anything of Brian Lewis remaining at all? “Espionage stories are often about ...