To Save A Mockingbird

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.

A close protection officer taking a bullet while shielding their principal – a normal hazard of the trade. However, when a close friend is shot on a low paid contract and the shooter turns out to be one of their own, Drew Parker vows to catch him. 
In so doing he unearths a conspiracy with far reaching international implications but the FBI dismiss his findings, and he's forced to find ways to expose the plot without directly going head-to-head against the pariah state behind it.