Cosmic police officers responsible for protecting the universe, the Green Lantern Corp is an organization numbering in the hundreds, with each Lantern assigned sectors of space to patrol. First introduced in the 1940s, The Green Lantern is one of the original superheroes of the DC Univese--with three generations of fans--and his (and their) popularity continues today. In Book 3 of Sleepers, Hal Jordan (the most popular of the Green Lantern Corp among comic book fans) has been stripped of his powers, but it is up to him to fight the clones of the villain Sinestro, set loose by actions in the trilogy's fist volume. In order to save the earth, he may have to sacrifice himself by taking the power rings on a one-way trip to the anti-matter universe.