Aquaman Annual #1

"Aquaman's dream of unity between surface and sea has come true! A utopia of human and Atlantean ingenuity, and a symbol of harmony between the two cultures, the city of Crownspire is Arthur Curry's greatest achievement. There Aquaman, Mera, and Tom Curry live in content. But who built Crownspire? Where is Murk? And what exactly is Tom Curry? Something is very wrong with Aquaman's world, and if he doesn't find out soon he may never live to see another day."