Books in the Paid in Blood series in order

The death of ROMAN's mother turns him into a full blown beast. There is no stopping the terror he unleashes until that pain in his heart is quelled. What will it take to quiet Roman's guns? Could it be a bullet to the heart? Or might it be the love of a woman who's as beastly in the streets as he? When this heartless, but sometimes affectionate demon finds his female counterpart, the bond they form through the pain that lives inside of them will lead to epic destruction. The price for what's happened in their lives must be PAID IN BLOOD. A bullet does not discriminate. Those who kill can be killed, too. Will Roman and his woman reap what they sow? Or will they escape with their lives intact and their love for each other unblemished?