Don Winslow’s 2005 novel, The Power of the Dog, is an epic crime thriller that chronicles the brutal, 30-year evolution of the American War on Drugs. The novel is the first installment in Winslow’s acclaimed Cartel trilogy, which also includes The Cartel (2015) and The Border (2019). The story centers on the relentless feud between Drug Enforcement Administration (DEA) agent Art Keller and the Barrera crime family, a conflict that begins in the poppy fields of 1970s Sinaloa and expands into a sprawling hemispheric war. The narrative explores themes including Institutional Corruption and the Futility of the War on Drugs, The Corrosive and Self-Defeating Nature of Vengeance, and The Dehumanizing Cycle of Violence in the Drug Trade. Winslow, a former private investigator, is known for his meticulous research, and the novel is praised for its realism and unflinching depiction of the drug trade’s violence and complexity.

The Power of the Dog begins with the 1975 anti-drug offensive Operation Condor and incorporates fictionalized versions of the Central Intelligence Agency (CIA)’s covert operations in Central America during the 1980s, mirroring aspects of the Iran-Contra affair. Winslow’s characters are often analogues for real figures from the early history of the Mexican cartels, lending the sprawling story an air of authenticity that has drawn widespread critical acclaim. The novel’s complex web of characters includes an Irish American hitman, a high-class sex worker, and a crusading Catholic bishop, whose lives become entangled in the vast shadow economy of the drug trade. An FX television series adaptation of the trilogy is in development.

This guide is based on the 2006 Vintage Crime/Black Lizard e-book edition.

Content Warning: The source text and this guide contain depictions of graphic violence, sexual content, sexual violence and/or harassment, rape, gender discrimination, cursing, substance use, addiction, child death, illness and death, and physical abuse.

Plot Summary

Set against the American War on Drugs from 1975 to 2004, the novel traces a decades-long blood feud between a DEA agent and a Mexican drug dynasty, expanding outward to encompass organized crime, covert intelligence operations, the Catholic Church, and high-end sex work.

A 1997 prologue introduces 47-year-old DEA agent Art Keller as he surveys 19 women and children who were executed at a compound in El Sauzal, Baja California. Keller acknowledges his role in their deaths, having planted false information that led to the slaughter.

The story moves back to 1975. Art, half-Mexican and half-Anglo, is a former CIA operative now with the newly formed DEA, stationed in Sinaloa during Operation Condor, a joint Mexican-American campaign to destroy poppy fields. Isolated by colleagues who distrust his CIA background, Art befriends Adán Barrera, a young college student, and Adán’s uncle Miguel Ángel Barrera, known as “Tío,” a state policeman. Tío offers Art a covert partnership: intelligence to dismantle the local opium lord, Don Pedro Áviles, in exchange for DEA enforcement muscle. The collaboration succeeds, but Tío’s men execute Don Pedro rather than arrest him, and Art realizes Tío used him to seize power.

Tío convenes the surviving drug lords and proposes a Federación, dividing Mexico’s smuggling territory into three plazas, or geographic zones, with himself coordinating from Guadalajara. He reveals the trade’s future: trafficking Colombian cocaine through Mexico into the United States. During Condor, Art also encounters Juan Parada, a fearless Catholic bishop who blocks soldiers from burning villages, and rescues the young Adán from torture by Mexican federal police. These acts forge bonds that greatly influence later story events.

Parallel storylines introduce Sean Callan, a 17-year-old from New York’s Hell’s Kitchen who kills an enforcer to protect his friend. Callan parlays a stolen loan-sharking ledger into control of neighborhood rackets under the Cimino Crime Family; and Nora Hayden, a teenage girl in La Jolla, California, recruited by a high-end brothel manager financed by Tío Barrera and trained as a sex worker. When the Cimino Family’s capo Jimmy “Big Peaches” Piccone brings Callan to San Diego for a cocaine deal with Adán, Callan is instantly smitten with Nora, but Peaches claims and rapes her. Sal Scachi, a decorated Green Beret colonel who is also a Cimino member and CIA asset, brokers the business connection between the Ciminos and the Barreras.

By 1984, Art is the DEA’s Resident Agent-in-Charge in Guadalajara. He and agent Ernie Hidalgo confirm that the Federación has become a massive cocaine transportation network, but every American agency refuses to cooperate with his investigation. Art illegally bugs a condo where Tío conducts an affair, feeding intelligence to police through a fictitious informant persona he calls “Source Chupar.” Massive seizures follow. Tío retaliates by threatening Art’s family, and Art’s wife, Althea, takes their children to San Diego.

Art discovers that the Federación’s planes carry weapons south as well as cocaine north. He intercepts a flight whose pilot references “Cerberus,” an unknown government program. Before Art can press the investigation, Ernie is kidnapped and tortured by Tío’s men, who demand the identity of Source Chupar. Despite Art’s efforts and Parada’s public radio plea calling for Ernie’s release, Güero Méndez, the Baja plaza boss, kills Ernie with a lethal heroin overdose. Art finds Ernie’s mutilated corpse in a ditch.

Art captures Tío in El Salvador, but Scachi arrives with troops and frees him. At a jungle training camp, CIA station chief John Hobbs reveals Operation Cerberus: a covert program that uses drug money and arms trafficking to fund the Contras, the anti-Communist rebels fighting Nicaragua’s Sandinista government, with Tío as a key financier. Hobbs coerces Art into silence with fabricated evidence and the promise of eventual revenge against the Barreras. During the capture, Art also whispers a deliberate lie into Tío’s ear: that Güero Méndez was Source Chupar. This fabrication tears the Federación apart. Tío, now incarcerated and experiencing drug addiction, orders savage retribution against Güero’s family, culminating in the murder of Güero’s wife Pilar and their children.

A catastrophic 1985 earthquake in Mexico City brings Nora and Parada together, allowing them to forge a deep friendship. Over the following years, Art lies to Congress about Cerberus, destroying his marriage. In exchange for his perjury, Hobbs gives him free rein to pursue Ernie’s killers. Meanwhile, Scachi forces Callan to assassinate the Cimino Family boss and then deploys him as a hitman across Latin America in Operation Red Mist, a coordinated campaign of right-wing assassinations. Callan eventually becomes the Barreras’ bodyguard.

Events converge at the Guadalajara airport in 1994. Adán orchestrates a trap using Parada’s peace negotiations as cover. In the ensuing gunfight, the Barreras’ hitman Fabián Martínez deliberately shoots Cardinal Parada at point-blank range despite Callan’s screams. Parada dies in Callan’s arms, forgiving his sins. Fabián retrieves a briefcase containing evidence of Cerberus and government corruption. The Barreras’ rivals are systematically eliminated, and Adán becomes the undisputed head of a reconstituted Federación.

Callan, devastated, experiences alcohol addiction in San Diego. Nora, driven by rage over Parada’s murder, becomes Art’s deep-cover informant inside Adán’s organization, handwriting intelligence and mailing it during shopping trips. When Adán negotiates a guns-for-cocaine deal with Colombian guerrillas and purchases weapons from the Chinese military, Nora provides the intelligence that leads to a massive arms bust at Long Beach harbor. The Barreras discover the betrayal, and Adán’s brother Raúl takes Nora to an isolated compound for interrogation. Art’s colleague Shag Wallace secretly sells intelligence to the Barreras’ allies, revealing that Fabián, not Nora, was the informant.

Art leads an illegal covert raid on the compound. In the firefight, Raúl is mortally wounded, and Callan carries Nora to safety. Adán euthanizes his dying brother, then goes into hiding. Art stages Nora’s death and places her under Callan’s protection. When Adán’s daughter Gloria survives a stroke, Art uses Gloria’s health crisis to lure Adán across the border, capturing him at the hospital. Adán reveals his leverage: He keeps copies of the Cerberus evidence stored in a Grand Cayman safe-deposit box.

Hobbs orders Art surrender Adán to the CIA. Art refuses, and Hobbs forces a prisoner exchange on San Diego’s Cabrillo Bridge. On the bridge, Nora betrays the exchange, handing a gun to Art and telling Adán she was the informant and she never loved him. Callan, positioned as a sniper, shoots Scachi instead of Art. In the ensuing gunfight, Tío and Hobbs are killed. Art chases Adán through Balboa Park, tackles him into a fountain, and holds his head underwater, screaming the names of the dead, before pulling him up alive.

An epilogue set in 2004 finds Art tending a garden of poppies between rounds of congressional testimony that fail to produce a concrete outcome. Adán serves 12 consecutive life sentences. Nora and Callan have vanished into new lives. More drugs enter the country than ever. Art murmurs the psalm that gives the novel its title: “Deliver my soul from the sword; my love from the power of the dog” (542).