Concept: “I keep asking it for a way out but it only motions me to remain silent.”
Content: A very patient librarian.
Writing: Clear mechanics and description that evokes a potentially labyrinthine encounter.
Art/design: An offset, alienating, and intentionally disorienting collage.
Usability: Tight text boxes hinder swift tracking between lines of text. 

Concept: “The great library of Galgenbeck is ruled by mole-like characters... It only makes sense that they would feed on bookwörms.”
Content: Worms that travel through books, figuratively.
Writing: A monster that encourages literacy. Laudable.
Art/design: I couldn’t spot the bookwörm in the backdrop.
Usability: Design that makes it easy to search for bookwörms. 

Concept: "...a library where it is rumored an entity older than story dwells, salvation writ on its skin." 
Content: A library only the dying world could love.
Writing: A heady catalogue of the mundane, academic, grotesque horrific, and surreal. 
Art/design: A calming midtone and clinical layout lends a stoic air to the dreadful proceedings, with one exception which can be found deep in the basement.
Usability: Well organized, easy to follow, quite likely to end in disaster.