The Door to December — Dean Koontz

Little Melanie had been kidnapped when she was only three. She was nine when she was found wandering the L.A. streets, with blank eyes. What had become of her in all those years of darkness ... and what was the terrible secret, clutching at her soul, that she dared not even whisper?

Her loving mother and the police desperately hunted for the answer. They needed Melanie to help get to the bottom of the most savage scene of carnage the city had ever seen. And they would do anything to save her from whatever dreadful force or thing had invaded her young life. But first they would have to save themselves from a rising tide of terror ... and from an icy evil howling through .. .