Unquenchable - David Dvorkin - Bog

Transformed into a human being, Richard Venneman risks agonizing death in his quest to become a vampire again. But he can't control the chain of events he started or the beings - humans, vampires, and others - whose lives he has changed. Seeking to transcend their natures, they are all drawn to the experimental machine Venneman needs and fears, with catastrophic results.