The mess of books that suposedly was left behind by a thief are all in front of the door. If the thief ran thrugh the door he would have pushed the books away from the door. This means that books must have been placed in front of the door after thief ran away or there is also a possibilte that there was no thief and the librarian just placed them there to cover up his tracks after he stole the book himself. Either way the librarian is somehow connected to theft.
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