This really doesn't have anything to do with Brightest Night, or even really with Darkest Night. It's a series of past stories starring the Green Lanterns, including at least one story with each of the Earth Lanterns. Johns selected the comics and gives an introduction to each. The idea being to give readers new to the Green Lantern mythology an introduction. Like Infinite Crisis Companion before it. The stories range from 1961 to 1994. It's a pretty good selection of stories, actually, including some really good ones (like Alan Moore's Mogo tale) and some really important ones (like John Stewart going public with his identity). They aren't all winners. There's a pre-Crisis Alan Scott/Hal Jordan team up that does absolutely nothing for me. Even the most uninitiated readers wouldn't need this to get a handle on all the Lanterns for Blackest Night, so it's really not necessary. If you can get it from the library and have an interest in the history of these characters but don't want to invest the time in going through some Archives.