Bit of a misleading title this one, since the tales in this book all come from but one Corps; The Green Lantern Corps.
The first centers upon Kilowog, and his days as a rookie Green Lantern being trained by a hard-ass Sarge-type named Ermey. (Get it? Get it?)
It's not subtle, but it is a fitting tribute given that R. Lee Ermey has played The Sarge in so many war movies and in so many parodies of so many war movies that he's become synonymous with the type. And this comic is, in the early parts at least, the closest thing you can get to a Full Metal Jacket tribute in a comic that peaks at PG-13 at its' worst.
The second story is a little shorter, but no less dark. It focuses upon Arisaia - the teenage girl who become Green Lantern of sector 2815, following in the footsteps of her father, her uncle and and entire family line of Green Lanterns who all died in the line of duty.
Not much plot besides that, but it does give us some insight into Arisaia's character, showing how at a time when most girls think only of games and boys, she was already longing to do something greater with her life. And I think it's a fair bet that some of Arisaia's family will be coming back to visit. Heh heh heh.
The final story is not a story at all but a low-tech DVD-style commentary of Blackest Night #0, lain over the pencils of that book.
Your tolerance for this sort of thing may be linked to whether or not you are the sort of person who likes to hear artists talk about their work or the kind of person who listens to DVD commentaries. I am, so I loved this. But I can see how it might make for tedious reasoning for those of you who don't care to know that Geoff Johns decided to make Hal and Barry the central characters in this story since the other big heroes of the DCU are all busy with their own problems at the moment - Superman with New Krypton, Wonder Woman with building a new life in the wake of her leaving the Amazons and Greek Gods behind and Batman.. uh, being dead.
The Final Verdict: Two good stories and an interesting commentary on Blackest Night #0, if you are the sort of person who likes listening to the commentaries on DVDs. The only problem is that none of this seems to have anything to do with Blackest Night, apart FROM the commentary.
Those just picking this up for the story of Blackest Night can probably skip this book but fans of the old Tales of the Green Lantern Corps series as well as the current Green Lantern Corps book will want to get it just for the stories focusing on Arisia and Kilowog.