The Widowmaker Unleashed (Widowmaker Series #3)

Jefferson Nighthawk has finally been cured of his disease. He's physically 63 years old, and all he wants to do is retire and work in his garden -- but he finds himself constantly threatened by enemies his two clones made while he was frozen, enemies he doesn't know or recognize. And finally he must become the Widowmaker again, or come up with a totally unexpected solution.