"God was merciful that day. Richard never had a chance to see the carnage that had been perpetrated on his wife and daughter."

From The Dog You Feed by Thomas Freeman Carr

A brutal, psychotic murder leaves a young family slaughtered. All evidence is destroyed in a fire set by the killers. David Masters, a passionate but troubled young man, is emotionally devastated by the hideous slayings of his best friend and family. As David sets out to wreak vengeance, he must first destroy his conscience, his humanity, and ultimately himself. In his quest for revenge he angers people far more powerful and dangerous than he. Before his hunt is over David finds himself the one who is hunted. The Chicago Mob, Russian mercenaries, and an ex-Nazi are determined to find him and kill him. Can he save his very soul as he invites Evil into his heart and confronts Darkness with Darkness?