Starting in the 1950s, Americans eagerly built the planet’s largest public work: the 42,795-mile National System of Interstate and Defense Highways. Before the concrete was dry on the new roads, however, a specter began haunting them—the highway killer. He went by many names: the “Hitcher,” the “Freeway Killer,” the “Killer on the Road,” the “I-5 Strangler,” and the “Beltway Sniper.” Some of these criminals were imagined, but many were real. The nation’s murder rate shot up as its expressways were built. America became more violent and more mobile at the same time.

Killer on the Road tells the entwined stories of America’s highways and its highway killers. There’s the hot-rodding juvenile delinquent who led the National Guard on a multistate manhunt; the wannabe highway patrolman who murdered hitchhiking coeds; the record promoter who preyed on “ghetto kids” in a city reshaped by freeways; the nondescript married man who stalked the interstates seeking women with car trouble; and the trucker who delivered death with his cargo. Thudding away behind these grisly crime sprees is the story of the interstates—how they were sold, how they were built, how they reshaped the nation, and how we came to equate them with violence.

Through the stories of highway killers, we see how the “killer on the road,” like the train robber, the gangster, and the mobster, entered the cast of American outlaws, and how the freeway—conceived as a road to utopia—came to be feared as a highway to hell.

Jack the Ripper. Jeffrey Dahmer. John Wayne Gacy. Locusta of Gaul. If that last name doesn’t seem to fit with the others, it’s likely because our modern society largely believes that serial killers are a recent phenomenon. Not so, argues Debbie Felton—in fact, there’s ample evidence to show that serial killers stalked the ancient world just as they do the modern one.

Felton brings this evidence to light in Monsters and Monarchs, and in doing so, forces us to rethink the assumption that serial killers arise from problems unique to modern society. Exploring a trove of stories from classical antiquity, she uncovers mythological monsters and human criminals that fit many serial killer profiles: the highway killers confronted by the Greek hero Theseus, such as Procrustes, who tortured and mutilated their victims; the Sphinx, or “strangler,” from the story of Oedipus; child-killing demons and witches, which could explain abnormal infant deaths; and historical figures such as Locusta of Gaul, the most notorious poisoner in the early Roman Empire. Redefining our understanding of serial killers and their origins, Monsters and Monarchs changes how we view both ancient Greek and Roman society and the modern-day killers whose stories still captivate the public today.