Book excerpt: Bloodshed connected with Mexican drug cartels, how they emerged, and their impact on the United States is the subject of this frightening book. Savage narcotics-related decapitations- castrations, and other murders have destroyed tourism in many Mexican communities and such savagery is now cascading across the border into the United States. Grayson explores how this spiral of violence emerged in Mexico, its impact on the country and its northern neighbor, and the prospects for managing it. Mexico was named an Outstanding Academic Tide of 2010 by Choice Magazine.