Book excerpt: Writer Peter J. Tomasi and hot artist Patrick Gleason expand on the War of the Light as the evil Black Lanterns descend on all of the Corps throughout the universe in this must-read BLACKEST NIGHT tie-in that features key plot points that are essential to enjoying the storyline to its fullest. Just when things couldn't look any darker, Green Lanterns Kyle Rayner, Guy Gardner, John Stewart join the rest of the GL Corps in the fight to preserve the Central Power Battery and the planet Oa from being consumed by the Black Lanterns. This deadly battle threatens to engulf not only the Corps, but the Universe itself! Collects GREEN LANTERN CORPS issues #39-47.