The Mailman

Mercury Carter is a deliveryman and he takes his job very seriously. When a parcel is under his care, he will stop at nothing to deliver it directly to its intended recipient. Not even, as in the current case, when he finds a crew of violent men at the indicated address that threaten his life and take the woman who lives there hostage. That's because Carter has special skills from his former life as a federal agent with the postal inspection service, skills that make him particularly useful for delivering items in circumstances as dangerous as these.
After Carter dispatches the goons sent to kill him, he enters a home besieged by criminals―but the leader of the gang escapes with attorney Rachel Stanfield before the mailman can complete his assignment. With Rachel's husband Glenn in tow, Carter takes off in pursuit of the kidnapper and his quarry, hunting them across Indiana, up to Chicago, and into small-town Illinois. Along the way, he slowly picks off members of the crew and uncovers a far-reaching conspiracy and a powerful crime syndicate, all in service of his main objective: to hand the package over to Rachel. Carter has never missed a delivery and isn't about to start now.
Introducing a new lone-wolf protagonist to rival Lee Child's Jack Reacher, Steve Hamilton's Nick Mason, and Gregg Hurwitz's Evan Smoak, The Mailman is a pulse-pounding series opener with captivating action and enough thrills to leave readers anxiously awaiting the next installment.