Buried in The Woods Below by Daniel G. Miller

When Charlotte Hoffman's picture-perfect career implodes overnight, she retreats to the one place she swore she'd never return: Big Island, Minnesota. Home to her childhood best friend, Olivia Parker, and the place where her life first fell apart.

Eighteen years ago, tragedy struck, and Charlotte's blamed herself for that bloody night ever since. Now she's back, staying with the Parkers in their isolated lakeside home, surrounded by dark woods shrouded in mist and the decaying remains of a long-abandoned amusement park.