Michelle Maxwell has just blown her future with the Secret Service. Against her instincts, she let a presidential candidate out of her sight to comfort a grieving widow. Then, behind closed doors, the politician whose safety was her responsibility vanished into thin air.

From David Baldacci - the modern master of the thriller and number-one worldwide best-selling novelist - comes a new hero: a lone Army Special Agent taking on the toughest crimes facing the nation. John Puller is a combat veteran and the best military investigator in the U.S. Army's Criminal Investigative Division. His father was an Army fighting legend, and his brother is serving a life sentence for treason in a federal military prison. Puller has an indomitable spirit and an unstoppable drive to find the truth.

Every day without fail, Travis Devine puts on a cheap suit, grabs his faux-leather briefcase, and boards the 6:20 commuter train to Manhattan, where he works as an entry-level analyst at the city’s most prestigious investment firm. In the mornings, he gazes out the train window at the lavish homes of the uberwealthy, dreaming about joining their ranks. In the evenings, he listens to the fiscal news on his phone, already preparing for the next grueling day in the cutthroat realm of finance. Then one morning Devine’s tedious routine is shattered by an anonymous email: She is dead.

Eeny, meeny, miny, moe. Catch a tiger by its toe. It's seared into Atlee Pine's memory: the kidnapper's chilling rhyme as he chose between six-year-old Atlee and her twin sister, Mercy. Mercy was taken. Atlee was spared. She never saw Mercy again. Three decades after that terrifying night, Atlee Pine works for the FBI. She's the lone agent assigned to the Shattered Rock, Arizona resident agency, which is responsible for protecting the Grand Canyon. So when one of the Grand Canyon's mules is found stabbed to death at the bottom of the canyon - and its rider missing - Pine is called in to investigate.

It exists at the fringes of Washington, D.C., has no power, and consists solely of four eccentric and downtrodden members whom society has forgotten. Their simple goal is to find the "truth" behind their country's actions.