1 Alvissa: Why are we searching a smaller library first?
2 Kyros: The book I want must be in some library.
3 Kyros: If we search the smallest ones first, it’ll be easier to find!
4 Alvissa: I thought you had to be smart to be a wizard.
4 Kyros: I thought you had to be perceptive to be an elf.

You don't want to go looking for a book in a huge magical library. You'll never find it!

Unless they catalogue everything with the Druidic Decimal System.