User blog comment:Herald of meridian/Yen Press Volume 1 Release Terminology List/@comment-125.60.240.201-20141120075622/@comment-125.60.240.201-20141120135338

^Can you give the furigana for Cultes des Goules?

Also, Unaussprechlichen Kulten is the more famous name of the Nameless book used in the Cthulhu Mythos. The Japanese Wikipedia article entry on the grimoire uses 無名祭祀書, the same one used in the index novel, to refer to it. So it is likely what the Japanese calls the grimoire in their translations of the Cthulhu Mythos stories and is where Yen Press got its translation.