Atlantis

From publisher blurb: The Atlas of Earth-Prime goes from the surface of the world to beneath the seas, exploring the fabled lost continent of Atlantis. Once the home of the most advanced civilization on Earth, Atlantis sank beneath the ocean thousands of years ago, its surviving people transformed into aquatic water-breathers. For decades the House of Atlan—the Atlantean royal family—have held ties to the surface world and hero teams like the Liberty League, Freedom League, and the Next-Gen. Explore their mysterious homeland and dangers in the shifting currents of power in their undersea realm.