Charles Williams 
Mexican Gambit [EPUB ebook] 

Lead or silver; a bribe or a bullet. Those are the choices in a world of crime, drugs, corrupt politicians, thwarted ambitions, revenge and rivalries. Its no place for a cop who just wants to do his job and keep his hands clean. But when his boss hands him a murder case with a warning that it isnt an ordinary murder, his life changes. He finds himself in the middle of a deadly rivalry between heavyweight egos, one touched with greed and madness, the other obsessed with revenge. His only way out is to take sides, and when he does hes surprised to find allies where he least expected them. In spite of putting his life and that of his family at risk, nothing seems to work until a violent resolution comes from a direction he least expected.