The spirit put a hand on Phoebe's arms, and they floated up to visit the new expanded library. Apart from the difference in size from the old one, there was another change, a phantom outside the door keeping everything and everyone out.
It was a spectral figure; one Phoebe had read about. It had no permanent shape, often changing shape depending on the observer's deepest fears. To temporary visitors of the space, it looked like a faceless humanoid creature cloaked in flowing red robes whose edges dissolved into mist.
"This is the keeper." The Saxon spirit introduced to Phoebe "It is a sentient and intelligent being that knows all the secrets of the space. It was once a mortal that married a guardian if the space and surrendered his soul to stay with her forever here, living as the library's eternal guardian."
When Phoebe tried to go in, it stopped her.
"Password." It demanded.