Legends and tales of evil and menacing creatures have tormented the living for centuries. Yet in the brightness of the day, those things that go bump in the night seem not quite possible. Those living go about their days unaware of the true horrors that hide in the shadows, waiting for the stillness of the night to reveal themselves. Fiction? Fantasy? No, they are real, and seek to find us vulnerable in the dark, if we let them.    Evil finds sanctuary in London's murky nights, taunting eternity's repose. The undead exist in cursed limbo, tormenting the living. Neither of this world or the next, they cheat both death and time. They are here, among us, even now.    Authors from the past have tried to warn us about the undead in their tales of horror. Poe, Shelley, Dickens, Stoker, all have shared truths about the evil that awaits us. Their stories are our guide books that will help us prepare to fight these unnatural enemies. We know they are coming for us. The time is soon. It may have already started. Beware!    --Professor John Byron, descendent of Lord George Byron, in his lecture to his students at Kingston University, London, England.