House Haunted By Al Sarrantonio

A thousand years ago, something evil made a bold attempt to cross into this world. Now it's ready to try again. She's eternally young, lovely and lethal. Her cry for help is heard by a teenage boy in Bermuda. A confused orphan in Montreal. A political prisoner in Poland. A raging paraplegic on the Pacific coast. And a bloodthirsty psychopath in New York City. Each of them is lost, confused, alone. Too weak to resist her siren call.

They come cutting a path of carnage across the globe. And at last they meet. In a lonely mountain mansion. A place of unutterable evil. A place they are never meant to leave.
 
- Goodreads Summary