John Rozum is an American writer of comic books and graphic novels who is best known for his work for Milestone Comics, where he wrote Xombi and Kobalt. He has also written most often for DC Comics but has also written for Topps Comics (where he wrote a comicbook adaptation of The X-Files) and Marvel Comics. In 2009, NBC announced that they were beginning an adaptation of Rozum's Vertigo Comics series: Midnight, Mass. Aside from his personal blog, Rozum regularly publishes on The Grim Gallery which he runs as a digital museum for treasures from classic Hollywood horror films.