Of course, since space is limited in the branches, a branch must order any item it wants. The Library is open to all citizens of The Realm. It is not a lender's library, so items can not be removed from the premises, but may be copied or purchased, if desired. The collection of knowledge at the Library, particularly the main center at University is amazingly complete and comprehensive. It contains scholarly essays and books on all of the flora, fauna, city-states, magic, etc. which are currently known.
New information is added and old information updated continually.
It is a civic duty to inform the Library of any new knowledge or changes to what is already known. For example, if someone discovered an Old World artifact that is not catalogued in the Library, he is obliged to submit an entry so that the Library can remain up to date. The Library is maintained by the Caste of Scribes. The highest honor a Scribe can attain is to become a Librarian. They collect information, process it, and file it in a unique and complicated system.