When people ask what you do for a living, there are few answers you could give that would sound more impressive than “spymaster.” But that was exactly what William Stephenson did during World War II, as he was absolutely instrumental in establishing the UK’s intelligence network in North America and creating a tight-knit relationship between numerous different agencies from both sides of the Atlantic. And if that wasn’t good enough, he also had a badass codename: Intrepid. And sure, S...