There was a time many years ago when a poster of a kilt wearing Rowdy Roddy Piper hung from my bedroom door. Watching professional wrestling was a cherished part of my childhood, but like playing Nintendo and building tree forts, it was a habit I ultimately outgrew. Fortunately, one doesn’t need to be a regular viewer of Monday Night Raw to enjoy David Shoemaker’s terrific book, “The Squared Circle, Life, Death, and Professional Wrestling.” After giving an impressively resear