The Collect Call of Cthulu
And ancient and powerful book that contains unspeakable horrors. It was written in the ten century A.D. by Mad Mohamed Alrahiem (or Mohamed “I just get these Head Aches” Alrahiem) and lost to time until it was uncovered in the personal effects of Alister Crowley. Afterwords it was sold to a private collector and given to the Library. It’s name translates roughly to the literal “Telephone-book of the dead” who knows what unspeakable horrors it holds.