Necronomicon Ex-Mortis

The Necronomicon Ex-Mortis is the infamous Sumerian grimoire. Not much is known about the creation of the book. It was written by mysterious beings known as "The Dark Ones" who traveled to Hell and studied Demons; The passages in the book are designed to resurrect these Demons and give them "License to possess the living". The pages of the book were inked with human blood, gathered from Hell's "Sea of Blood" and bound together in the flesh. The book disappeared around 1300 A.D.

Professor Raymond Knowby unearthed the book in the ruins of the castle of Kandar. Professor Raymond Knowby and his wife where found killed near their summer cabin in Michigan. – edited from wikipedia