Flint's code

"Karl Gröber is a vicious East European criminal, one of the FBI's Ten Most Wanted. Flint goes undercover to infiltrate his organisation and bring him to justice. Posing as a grieving widow, she attempts to start a war between Gröber and his ally--Alexander Caracani, a ruthless Albanian sex-trader. But soon the line between cop and killer begins to blur. For Grace and Gröber share a twisted history and she's after more than justice, she wants revenge. And when Gröber targets the one thing that could destroy her, her son, it's only a matter of time before all hell breaks loose."--Summary on book.