Project Nemesis is a fan driven website for games that use the One-Roll Engine (like Nemesis, Wild Talents, Reign and Monsters) or Chaosium's Basic Roleplay System (BRP) (like Call of Cthulhu) and the Delta Green setting.
After the destruction of Hyperborea by the Ice Ages, copies of the books made their way to Atlantis by way of a secretive cult, from whence they travelled to Egypt and to the rest of the world.
It was translated from Hyporborean into Egyptian hieroglyphics, Punic and Greek. Though knowledge in original book of Eibon is great, only a fraction of the of this version has survived. There should be many rituals to call certain beings to terrorize earth.