C207 The Secret Room

The wall behind the bookshelves, along with the shelves themselves, executed a 180-degree turn, revealing a doorway just wide enough for a person to pass through.

From the outside, the interior was shrouded in darkness. Not even the faintest glimmer from the study could illuminate a single centimeter within; it resembled a sunless abyss, with a pervasive chill emanating from within