Legend Lore: The Grand Library of Calstona

A few lines about generic library information you could get just by going there and asking what a library is.
Unbeknownst to the common citizens of Calstona, the Grand Library of their town harbors a secret. An old sentience resides within its halls, within the shelves and the books. Its goals and desires are abstract and hard to parse even for those it trusts enough to grant with power. But as the days turn into weeks, and the weeks turn into months, the Library grows, though the building does not.