Green Lantern (2005-2011) #23

Hal Jordan! John Stewart! Guy Gardner! Kyle Rayner! Trapped in the depths of the Sinestro Corps' Citadel and face-to-face with the Guardian of Sinestro's army of fear! What it means will change the entire tide of the war. And as Oa prepares for the ultimate attack, the Guardians come to a terrifying conclusion.