A groundbreaking insider's look at the world of Mexican drug cartels, told through the eyes of a former member and the star witness in the trial of El Chapo. The Sinaloa Cartel is widely believed to be the most powerful drug cartel in the world, led by the legendary Ismael "El Mayo" Zambada and, until his arrest, Joaqu?n "El Chapo" Guzm?n. In 2009, El Mayo's son, Vicente Zambada Niebla, himself a high-ranking figure in the organization,...