It seems a list of rare books that the Church of Seiros does not make publicly available has turned up in Abyss. If you could somehow get your hands on that list...
Go to Abyss and search for the list of rare books . Once you've found the list, you should consider visiting the archives in Abyss. You may discover new information you wouldn't normally be able to find.
  1. Search for the list of rare books in Abyss.
  2. Report to the requester.
Thank you. Here, I've made a copy. Perhaps the books included in the list will be of use to you as well. I wonder what you'll find if you search the archives in Abyss...