The Thirteenth Guardian by M.W. Kaisla

On a not-too-distant future Earth, the war between the United Western Hemisphere and the barbaric powers of the East has dragged on far too long. To remedy this, a new program is launched; the Guardian Project; a top-secret program implementing war-like androids to protect the population of the West. But what is the nature of such an endeavor? Mild-mannered social engineer Livvy Parker is about to stumble across the answer, and within lies an underground world of monsters, machines, and children that are not all what they seem. The answer may be darker than Livvy ever desired to discover…..