Buying Time — Joe Haldeman

The Nebula Award�"winning author of The Forever War explores a world where time is money -- and for some, both are running out . . .
 
The Stileman Process is a medical miracle: Every ten years or so, you can restore youth and health to your aging, ailing body -- as long as you can pay the enormous fee. The scientific advancement has altered the twenty-first-century world even more than space travel.
 
Dallas Barr is one of the oldest men on Earth, and now he needs to repeat the procedure. But while scrambling desperately for his next essential million, he meets Maria, a woman from a previous life -- and makes two chilling discoveries: Not all Stileman “immortals” were created the same. And their days may be more numbered than they think . . .
 
From the author of The Hemingway Hoax and Camouflage, and the recipient of multiple science fiction honors including the Hugo, John W. Campbell, and Robert A. Heinlein Awards, Buying Time is “a mystery/SF hybrid that exhibits the author at his most inventive. . . . The action is fast and furious” (Publishers Weekly).