Often times in fiction, bookshelves hide a Secret Path. Often times you have to find a book to put in an empty slot in order for it to move. Other times you have to push the darn thing in order to get behind it.
Hello, Unkown Troper. You'll need to get known to lend a hand here.
Three days must pass before this YKTTW is Launchworthy or Discardable