Geoffrey Johns (born January 25, 1973) is an American comic book writer, screenwriter, and film and television producer. Johns's work on the DC Comics characters Green Lantern, Aquaman, Flash, and Superman has drawn critical acclaim. His critically acclaimed work includes Sinestro Corps War, Blackest Night, Throne of Atlantis, Flashpoint, Doomsday Clock, and Superman: Brainiac. He co-created the DC character Courtney Whitmore based on his deceased sister. He also expanded the Green Lantern mythology, adding in new concepts and co-creating numerous characters. Among the DC characters and concepts he co-created are Larfleeze, the Sinestro Corps, the Indigo Tribe, the Red Lantern Corps, Atrocitus, the Black Lantern Corps, Jessica Cruz, Hunter Zolomon, Tar Pit, Simon Baz, Bleez, Miss Martian, and Kate Kane. Wikipedia