Trust no one. Sam Callahan learned this lesson from a childhood spent in abusive foster care, on the streets, and locked in juvie. With the past behind him and his future staked on law school, he is moonlighting as a political tracker, paid to hide in crowds and shadow candidates, recording their missteps for use by their opponents. One night, after an anonymous text tip, Sam witnesses a congressional candidate and a mysterious blonde in a motel indiscretion that ends in murder, recording it all on his phone. Now Sam is a target. Set up to take the fall and pursued by both assassins and the FBI, he is forced to go on the run. Using the street skills forged during his troubled youth—as well as his heightened mental abilities—Sam goes underground until he can uncover who is behind the conspiracy and how far up it goes. (Revised edition: This edition of The Tracker includes editorial revisions.)

As a former political tracker with a brand-new law degree, Sam Callahan has turned his life around, leaving behind a childhood ravaged by abuse and a fatally dangerous job shadowing political candidates. Now a lawyer, Sam hopes for a risk-free future, but harm’s way has a much longer reach than he could ever expect. His very first legal client is gunned down in a Mexico City hotel, and Sam barely dodges a bullet himself. Suddenly on everyone’s most-wanted list—brutal hit men, hostile cops, relentless FBI agents, and even an infamous assassin—he doesn’t have the luxury of finding out why. When Sam’s girlfriend is dragged into the fray by a kidnapper, Sam would do anything to save her life. The catch? He’s got only twenty-four hours to do it… but any number of ways to die.

It’s the most important mission of his life—because it’s the most personal. Once a key player in a clandestine CIA squad, Sam Callahan thought he had finally found a safe, normal life as a rookie lawyer in DC with the woman he loves. But when called to a covert intelligence mission in the heart of Russia, he can’t refuse risking it all once more. This time, he’d be joining his estranged father, the Lion, a deep-cover agent Sam never even knew existed. When the operation goes wrong and his team is ambushed, Sam fears a setup. At least he escaped with his life. And so did his father. But why? With a target on his back, he must hunt down the truth behind the betrayal in Moscow—and find the Lion again. Now, crisscrossing Europe under the cover of shadow, Sam is about to come face-to-face with his past—and it’s never looked so dangerous.