Bottom of the Lake - Steven Stack - Bog

Four girls. Four stories. And an ending none of them saw coming.
When Vanessa, Lindsey, and Claire sneak away from Camp Kimi for a night of junk food and ghost stories, they meet Dani, a strange and distant girl none of them have seen before. As each tells her own scary tale, they reveal personal truths they could never share directly. But the newcomer has a story of her own, and before they know it, the three friends find themselves an unwitting part of it-and there might be no escape.