Horror devastates the DC Universe, and this volume details how DC's brightest heroes-Superman, Wonder Woman, Green Lantern, and the Flash-navigate the terror of the Nightmare Realm! In Knight Terrors, DC's heroes are taken past the land of the living, beyond the land of the dead, and directly to a new villain called Insomnia...who uses his powers to engulf every single hero and villain in their own dark and twisted nightmares. In this companion collection, see how Insomnia's Nightmare Wave affects Superman, Wonder Woman, Green Lantern, and the Flash! Trapped in the Nightmare Realm, Superman goes searching for his family... and finds the Super-Reaper! Cyborg Superman is scarier than ever and targeting the Super-Twins! Free from a cosmic prison, Barry Allen is back home, but there's no time to rest-as he's immediately thrust into a new nightmare! Wonder Woman reunites with the Justice League Dark to save the world from its waking nightmare! And Hal Jordan is confronted by his greatest fear... in the form of a hostile planet! This volume collects Knight Terrors- Action Comics #1-2, Knight Terrors- Green Lantern #1-2, Knight Terrors- Superman #1-2, Knight Terrors- The Flash #1-2, and Knight Terrors- Wonder Woman #1-2.