Bitter Root by David F. Walker & Chuck Brown

Once known as the greatest monster hunters of all time, the Sangerye family specialized in curing the souls of those infected by hate, but those days are fading. A terrible tragedy has claimed most of the family, leaving the surviving cousins split between curing monsters and killing them. Now, with a new breed of monster loose on the streets of Harlem, the Sangerye family must come together, or watch the human race fall to untold evil.