Book excerpt: A dirty little secret has haunted Shanna, Merrie, Dani and Brittany for 15 years. They've never talked about it. Not with each other, not with anyone. They've never so much as uttered the dead girl's name aloud. Instead, they fled Myrtle Beach, thinking it would help to keep them focused on looking ahead rather than looking back. Now a 15-year reunion is calling them home. Secrets will be revealed. And terror will strike. Often.