There's nowhere to hide, nothing to trust. All you have left is a classroom, eight missing books, and a monster closing in behind you.

This game isn't simply about wandering around the classroom and finding books. Each time you locate a hidden book and place it in slots 1 through 8 on the wall, a hint for the sorting puzzle is added to the board. The hints reveal the relationships between the books. For example, phrases like "The orange book and the blue book are adjacent" will guide your next choice.

But even the time spent reading the hints isn't safe. Each step further you explore brings you closer to the answer, but also increases the chance of being discovered by the monster. Should you retrieve the book now, or hide and change course once more? The moment your judgment wavers amidst the terror and pursuit, the puzzle becomes even more brutal.

There is only one correct answer. You can escape this classroom only when you arrange the eight books in the correct order.