Twilight read the letter for the tenth time since Spike had belched it forth.  Each time it seemed it had revealed some new bit of information, if the growing pile of books was any indication.  Spike had a sudden, probably not entirely inaccurate vision of every shelf in the library being empty, and an increasingly frustrated purple unicorn attempting to stuff them all in her saddlebags, and decided he had to put a stop to this before it got out of control.