Retirement is a dangerous game for a cloned bounty hunter, in the third and fourth books in the series featuring Jefferson Nighthawk.   There's no rest for the lethal—no matter what version—in the science fiction adventure series that proves "nobody spins a yarn better than Mike Resnick" (Orson Scott Card,  New York Times–bestselling author of  Ender's Game).   The Widowmaker Unleashed After more than a century in deep freeze, Jefferson Nighthawk is waking up from his sleep, finally cured of the disease that almost killed him. The sixty-two-year-old wants to settle down—easier said than done when the enemies of his clones still have scores to settle . . .   A Gathering of Widowmakers He may be retired from bounty hunting, but Nighthawk is still one of the three most dangerous men alive. The other two? His clones. But when the youngest one makes a nearly fatal mistake, he'll have to learn to match wits with both of the killers who came before him.   Praise for Mike Resnick   "Resnick is thought-provoking, imaginative . . . and above all galactically grand." — Los Angeles Times