Simply lies - David Baldacci

Former Jersey City detective and single mother of two, Mickey Gibson, now works for global investigation company, ProEye, to track down assets of the wealthy who have tried to avoid their creditors. One day she gets a call from a colleague, Arlene Robinson, asking her to visit the home of a notorious arms dealer who has cheated some of ProEye’s clients in the past. Mickey arrives at the mansion to discover the body of a man hidden in a secret room.
It turns out that nothing is at it seems. The arms dealer did not exist, and nobody at ProEye knew of Arlene Robinson. Mickey had been tricked and now the cops were involved. The body was that of Harry Langhorne, who’d been in Witness Protection having had links with the mob.
Now begins a cat-and-mouse showdown between hardened ex-cop, Mickey, and a woman with sociopathic tendencies who has no name and a mysterious past. She intends to get what she wants and people who get in her way will die. For Mickey to stop her, she must first discover her true identity and what damaged her all those years ago. And the truth behind why she selected Micky to become her nemesis . . .