The Tome of Ascension

According to Huhuman, "The Children of Grinneal":

• Book describing the rite of Ascension to godhood.
• The author ends completely mad towards the end. Only two third are legible
• "Various gold leaf designs adorned both the front and the back of the cover, and a single blue four-faceted gem was attached to the front of it. The gem was unnaturally cool to the touch."
• The ink appears relatively new
• The name of Kadath's darkness was apparently written but scratched out ~={orange}(Chadul probably)=~