Ioan Grillo is journalist who has spent the last 18 years reporting on the drug war in Mexico. His books are:"El Narco: Inside Mexico's Criminal Insurgency" and "Gangster Warlords".Ioan Grillo is journalist who has spent the last 18 years reporting on the drug war in Mexico. His books are:"El Narco: Inside Mexico's Criminal Insurgency" and "Gangster Warlords".Ioan Grillo is journalist who has spent the last 18 years reporting on the drug war in Mexico. His books are:"El Narco: Inside Mexico's Criminal Insurgency" and "Gangster Warlords".