Don Winslow's masterpiece is not only a page-turning thriller but also a rich and compelling novel about a very mixed group of characters, each in his or her own way seeking some sort of salvation or redemption. The plot is essentially simple: how the US government and some of its quasi-autonomous agencies (CIA, FBI, DEA) all for their own reasons encouraged, sponsored and actively financed and helped the development of the drug cartels and their trade in Mexico. Groups of characters - a young Chicano boy from the Barrio who makes good and becomes a Senator (and who is the target of an assassination plot that tops and tails the book); a morally troubled DEA boss who tries to do good, but who is driven by events and by a desire both for salvation and revenge to sleep with the devil; and the various gang leaders, some of them psychopathic, others urbane, civilised and deadly; a high-class prostitute; and a charismatic Catholic priest who is dedicated to the improvement of the lives of his people.