Broken Angel (Electronic book text)

One rule: don't lose. When Gabriel Morgan's sister disappears somewhere in New York's underground, he'll do anything to save her. But finding her is only the beginning, because Marcus Slade won't let her go for less than ten million dollars - earned through Gabriel's blood. Slade, one of five ruthless leaders of an organization identified only by a symbol, runs hookers and street fighters, and never gives up what's his. Including Gabriel's sister. To win her freedom, Gabriel is forced to undergo a brutal training program with Slade's top fighters in order to become one of them. He is branded, broken, given a new image, and a new name. In the ring, Gabriel is known as Angel...and he does not lose. Because the price for losing is his sister's life.