“Demon by Knight”, by David W. Gray is one of those books that will surprise you, time and time again. Even after reading the introduction and skimming a few chapters before really settling into the meat and bones of the story, I was pleasantly surprised at the way the book flowed from one unexpected turn to another. From the opening scene where you meet David Asher, the no-account miscreant who assaults an elderly woman for the change in her purse to score a good high, to the climactic ba...