Many people have precognitive dreams, others hear voices or see things once in a while, and some get a funny feeling in their bones telling them that something is wrong. It tends to run in families. In August of 2000, shortly after my sister-in-law, Diane, died, dark shadows started to attack my daughter Mary during the night. At first, fearful of sounding crazy, she didn't tell anyone. Who would believe her? When Mary finally got up the nerve to tell her roommate about the attacks, she was shocked to discover that Lauren had seen things too. Then another friend, Ned, told her evil spirits surrounded her. How would he know that? When Mary called to tell me that weird things had been happening to her and her friends, paranormal activity was furthest from my mind.