Knight Terrors: Green Lantern #1

Something is wrong in Sector 2814, and Hal Jordan, Kilowog, and a few other Lanterns must find the mysterious disturbance, despite a ban on any of Earth’s Green Lanterns leaving their world. What they discover is a planet controlled by a familiar face-the face of Hal’s greatest fear! And in a backup story, Sinestro finds himself thrust into a new reality that drags him into the darkest corners of his past…and perhaps his future.