Dates
- Cover date
- September 2007
- On sale
- August 8, 2007
- In stores
- July 11, 2007
- Pages
- 36
Values
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Editions and covers (6)
Copies of #21 are not all the same book. Here is how to tell each one apart.
- 2nd printing
Second Printing
Marked as a later printing on the cover or in the indicia.
Barcode 76194124438902112
Source ↗ - Newsstand edition
Newsstand
A UPC barcode in the cover's corner box.
Barcode 07098930750609
This edition’s page 
Variant CoverMetronSource ↗
Variant CoverMetronSource ↗
Creators
Publisher’s description
Sinestro's army of fear has gathered: Arkillo! Karu-Sil! The Cyborg-Superman! And hundreds more of the most terrifying villains the universe has ever seen! Hal Jordan has overcome great fear throughout his life, but what fear still lingers inside him? Parallax knows, and Hal's about to be reminded as he leads Earth's Green Lanterns on a life-or-death rescue mission in the middle of this war. Meanwhile, the Guardians of the Universe find dissent within their ranks as a bizarre prophecy is fulfilled. The secrets of the Green Lantern Corps and its power are about to be revealed!
Reprinted in
Green Lantern: The Sinestro Corps War (2008), Green Lantern: The Sinestro Corps War (2009), Green Lantern: The Sinestro Corps War (2011), Absolute Green Lantern: The Sinestro Corps War (2012), Green Lantern by Geoff Johns Omnibus (2015), Green Lantern by Geoff Johns (2019), Green Lantern Corps by Peter J. Tomasi & Patrick Gleason Omnibus (2023)