Justice League. Book 2. Graveyard of Gods. Hawkworld

Joined by the madman — The Batman Who Laughs — criminal genius Lex Luthor continues to gather the Legion of Doom, calling to his banner Black Manta and Cheetah, deadly foes of Aquaman and Wonder Woman. However, an even greater threat looms over the planet. Ancient sea gods have invaded Earth: they are bitter against Atlanteans and Amazons and threaten to flood the whole world. Arthur, Diana, and the other members of the League must stop both the Legion and the ocean lords — otherwise, the resurfaced secrets will drag the planet into the abyss of despair.
Meanwhile, Martian Manhunter, Hawkgirl, and Green Lantern head to Thanagar Prime in hopes of finding answers to their troubling questions. However, upon arriving in Hawkworld, the earthly heroes realize it is no longer the place they once knew...
The collection includes issues of the series “Justice League” #8–18, annual #1, as well as two specials for the event “Drowned Earth.”