Brooke, in his comment on my last library post, has kindly demonstrated for us all why I refuse to use the Library of Congress system. I hope never to use a library system for my own books - Nielsen Library ruined me on that forever.
Susie, however, reminded me that my other thought had been to have ethics near cultural studies. So my new system will run:
~OT, Bible, NT, Biblical Theology
~Funky interfaith/generally spiritual stuff
~Books of prayers and liturgies that aren't officially licensed by ECUSA
~Various and sundry other, beginning with ancient languages of the sort used by the early Christian liturgists.
Methinks this will also make it easier to work in preaching - I imagine it will eventually go somewhere between ethics and spiritual biography.