Raze by Tillie Cole 

Conditioned in captivity to maim, to kill and to slaughter, prisoner 818 becomes an unremorseful, unrivalled and unstoppable fighter in the ring. Violence is all he knows. Death and brutality are the masters of his fate. After years of incarceration in an underground hell, only one thought occupies his mind: revenge…bloody, slow and violent revenge.

Revenge on the man who lied. Revenge on the man who wronged him… Read more.