Green Lantern - The Sinestro Corps War (2008)

Sinestro -- Hal Jordan's former mentor and arch-nemesis -- has gathered an army of soldiers fueled by the fear they instill in others, consisting of Arkillo, Karu-Sil, the Cyborg-Superman, and hundreds more of the most terrifying villains the universe has ever seen! Former Green Lantern Kyle Rayner has been possessed by the entity known as Parallax and now assists the Sinestro Corps in cutting a swath of evil across the universe. Trapped in the depths of the Sinestro Corps' Citadel and face-to-face with the Guardian of Sinestro's army of fear, Hal Jordan must find the will-power to battle these terrible foes. And as one of the Book of Oa's prophecies comes true, the Green Lantern Corps makes a last stand that reveals the reincarnation of one of their fold!
Collects Green Lantern (2005-2011) #21-25, Green Lantern Corps (2006-2011) #14-19 and Sinestro Corps Special #1.