We had Nicolás Obregon on the program for his debut novel "Blue Light Yokohama." That dark murder mystery introduced readers to the deeply troubled Inspector Iwata. The author returns with his second book in the series, "Sins as Scarlet," and readers of his first book are in for a major surprise; the first novel was set in Japan while the new one takes place in Los Angeles and along the Mexican border. And Iwata is now working as gumshoe in L.A. Classic! Illegal immigration across the Mexican