From audible.com:

Twenty crime stories by the creator of Jack Reacher, never before collected

For the past twenty years, Lee Child has been one of the bestselling authors in the world, thanks to the popularity of his iconic and instantly recognizable hero Jack Reacher. But even at the height of Reacher's fame, Child's short story writing was not confined to the series; throughout the course of his career, he published tales about a range of characters on both sides of the law, including assassins, a body guard, CIA and FBI agents, gangsters, and more. Meticulously plotted and packed with Child's trademark action and suspense, this collection shows the author's mastery of the short form.

In "Ten Keys," a drug-dealing hit man feels that he must unburden his fears and guilt to a stranger. A rookie cop in "Normal in Every Way" is assigned to the department's file room, where he makes connections to historic dates that could lead to solving crimes. A methodical bodyguard quits his job when he's outsmarted. A military mission is planned to perfection. A potential worker for the Manhattan Project is carefully surveilled by an FBI agent. A killer preys on other killers. Taken together, these stories are a riotous calamity of criminals and crime fighters; individually, they are expertly crafted, piercing tales that hit hard enough to leave a mark.