Brian Lumley 
Necroscope III: The Source 

An invasion from an alien dimension! That would be horror enough in itself: the thought of monstrous beings stalking the Earth. But how much more nightmarish if the invaders were each and every one . . . VAMPIRES!Searching the infinite parallel time-streams of the metaphysical Mobius Continuum for his long-lost wife and son, the Necroscope Harry Keogh discovers that Soviet scientists have accidentally opened a portal to mankind’s worst nightmares. The lethal terror of Chernobyl is a mere bad dream in comparison.THE SOURCE of all Dark Legends can now be reached by any who dare pass through the Gate. And by some who do not dare – but who have no choice . . .