In these team-up tales from the mid-1970s, Green Lantern and Green Arrow face fantastic threats, starting with the former Green Lantern known as Sinestro! Also in this collection, Green Lantern Katma Tui pursues a monstrous beast to Earth, and Green Arrow accidentally enters Green Lantern's Lantern and becomes cosmically charged. Plus, the Golden Age hero called Air Wave returns in a new guise, as Hal Jordan's young cousin, and Green Arrow's romantic relationship with Black Canary takes some unexpected turns. Collects Green Lantern #90-106.