This book explores the unlikely relationship between two men who shared nothing in common but a heroic nature. As the fearless ring-wielding Green Lantern, Hal Jordan was a cocky and brash adventurer who believed himself to be invincible. His polar opposite, Barry Allen was a modest and clean-cut police scientist who respected his own mortality. But in spite of their extreme differences, Green Lantern and the Flash were the best of friends. Featuring appearances by Kid Flash and Green Arrow, this book recounts some of their greatest adventures together and explains how the fastest man alive and the emerald knight put aside their differences and formed an unbreakable bond of friendship.