Richard Osman writes unusual "journey" stories: Something bizarre happens, and we follow the consequences, and yet, simultaneously, very "relatable" tales unfold (on the sidelines). In "The Last Devil to Die," an antiques dealer becomes involved in a heroin operation. This seems to lead to his murder. An investigation points to a colleague named Samantha, who once pissed away her life by mourning the loss of her husband, but who discovered a second wind when she realized she loved committing crimes. (She sold a fake antique to a man who later threatened to kill her, then the two bonded over a spur-of-the-moment plan to pursue a career in art forgery.) While the insane heroin story unfolds, Osman also tells us about dementia. A loving marriage is disrupted when the husband, Stephen, begins to lose his mind. He writes a letter to himself--detailing the facts of his case--and he receives the letter in the mail. "You are in great pain, even if you don...