A Requiem For Lost Libraries

Some mortal clay retain the shape of the life that lived them. Even when that clay is bound up with the roots of a dead library-tree.

There is a ghost haunting the corridors of Ponyville's newest dwelling, the princess's Castle of Friendship. It is a ghost without voice, or hoof, or spectral limb to cast strange shadows upon crystalline walls.

But it's not the ghost of a pony. It's not a person at all.