"Chuck Wendig weaves his magic once more, turning a lonely staircase in the woods into a searing, propulsive, dread-filled exploration of the horrors of knowing and being known."--Kiersten White, author of Hide and Lucy Undying

Five high school friends are bonded by an oath to protect one another no matter what.

Then, on a camping trip in the middle of the forest, they find something extraordinary: a mysterious staircase to nowhere.

One friend walks up--and never comes back down. Then the staircase disappears.

Twenty years later, the staircase has reappeared. Now the group returns to find the lost boy--and what lies beyond the staircase in the woods. . . .