Maureen Orth’s 1999 book, Vulgar Favors: Andrew Cunanan, Gianni Versace, and the Largest Failed Manhunt in U.S. History, is now the backdrop of FX’s nine-part series, “The Assassination of Gianni Versace: American Crime Story”. But while the TV show may shine the spotlight on Versace, Orth’s book dug deeper into the complex mind of Cunanan -- why he killed, how he hid in plain sight and why he targeted Versace.