Note:
"Jason is dying of cancer in the final stages when he's approached by a representative of a mysterious Institute, and offered a chance to live – three months at a time, each time with a new healthy body that slowly deteriorates over those few months. With a promise of an extended two years of life, he is to become an Enforcer for the Institute, eliminating a current evil."
Beyond the cloned body scenario, the books offer little of genre interest but there's a high body count and lots of sex.