The center bustles with trainers and nurses. After a small minute of chaos with a Frostlass and a Gengar, a nurse comes up to you. Welcome to the pokemon center, what can we do for you?
Oh just call me Linnea. We have quite a few books on that kind of thing. The Codex has quite a bit of material in it, and then there are quite a few books on specialty material. Agatha has written an extensive volume on the legends surrounding Darkrai for example.
While talking, she leads you through the maze of bookshelves towards the back of the shop. More and more shadows appear the further you go as the lights get dimmer.