If You Loved "The Gray Man," You'll Love Mark Greaney's Other Books

"Armored," one of Greaney's standalone novels, follows a classic "one last job" plot. Joshua Duffy was an elite bodyguard until a mission gone wrong results in the amputation of part of one leg and the apparent end of his career. Tired of being relegated to a mall-cop role, he jumps at the chance when an old friend recruits him for a supposed peace-dealing mission in Mexico. In reality, it's a dangerous job to attempt to negotiate a truce between brutal cartels, but it's his last chance to prove he's still got what it takes.