The New York Times–bestselling author introduces a pair of wild cards into the spy game: A brother and sister raised to deceive—and trained to kill . . .

From earliest memory, they've been taught to hide, to hunt, to survive. Jack and Jill, feuding twins who can never stop running. Clare, mentor more than mother, steeped them in the art of espionage, honed their skills in weaponry, surveillance, and sabotage. But as they grew older, they came to question her motives, her methods—and her sanity.

Now twenty-six, the twins are trying to lead normal lives. But when Clare goes missing, they realize her paranoid delusions are real. A twisted trail from the CIA to the KGB will lead them to an underground network of global assassins where hunters become the hunted. And where everyone wants them dead . . .

From the author of The Informationist, this is "a high-octane thriller that takes sibling rivalry to a new level." —Jeff Abbott, New York Times–bestselling author of Adrenaline

"Abundant action, unexpected twists, and a kaleidoscopic narrative keep the pace brisk and the tension high." —Publishers Weekly