Mary O'Reilly Alden froze and stared into the living room. She could swear that something moved in there. She walked around the counter, towards the living room, and heard a soft giggle. It sounded like a child's voice, but there was something about it that sent chills down her spine. "Who's there?" she asked, walking to the entrance of the room.The giggle repeated, this time clearer. "I don't find this funny at all," she replied firmly, trying not...