“The Least of Us,” by Sam Quinones, applies a kaleidoscopic approach to so-called designer drugs and efforts to combat addiction.“The Least of Us,” by Sam Quinones, applies a kaleidoscopic approach to so-called designer drugs and efforts to combat addiction.Read MoreBooks and Literature, Quinones, Sam (1958- ), The Least of Us: True Tales of America and Hope in the Time of Fentanyl and Meth (Book)