Bob Shaw 
One Million Tomorrows [EPUB ebook] 

The Price of Eternal Life In the 22nd Century, no one had to die of old age: an immortality drug was available to all. Its only drawback was the side-effect that ended a man’s sex drive, so most men waited till their youth was fading before they took the final step and became "cools."But Will Carewe became the first man to test a new variety of the drug, one without any side effects at all. The limitless future, a million tomorrows, stretched before him with golden hope – until a series of "accidents" made him realise that someone was trying to murder him.As an immortal Carewe had an infinitely greater stake in remaining alive. So he began the battle to find out who was after him, and why…