Prototype D, book 1
Jason D. Morrow2015

A hundred years after the world is decimated by nuclear wars, humanity has been reduced to a surviving city of people called the Mainlanders. They have food, water, and a wall that separates them from their enemies—the Outlanders.

Branded as savages, the Outlanders have grown in number and their attacks against the city have become more brutal. They threaten to overtake the city, bringing with them the doom and destruction that has plagued mankind for over a century. What the Mainlanders need is a weapon.

Des is the first robot created with a full range of human emotions. His reasoning skills and thought processes will make it so no human will ever have to step foot on the battlefield again. But when Des realizes his true purpose—to help destroy the Outlanders—he suspects that the real enemies might not be the people he was built to destroy, but those who created him.