In last month's Cthulu Tales #5, Mark Waid seeded clues and hints to the scope of BOOM!'s new "horrorverse". Now that the Necronomicon has been opened, writer William Messner-Loebs brings you the next chapter as he reveals the origins of the forbidden book of legend--and how its catastrophic influence will soon spread over the BOOM! line of titles! Cover by J.K. Woodward.