
When a series of disappearances strikes an expedition in the Pacific, Dr. Walter T. Goodwin documents the cause. The missing men have been pulled through a stone basin known as the Moon Pool by an entity of living light. Beneath the ocean lies the subterranean world of Muria, and the Shining One is claiming new subjects.
Descending in search of the lost, Goodwin and his companions—including the pilot Larry O’Keefe and a sailor named Olaf—enter an underground ecosystem of frog-men, crimson seas, and jet-black amphitheaters. They are soon trapped in the political machinery of the abyss. There, Yolara, high priestess of the light, attempts to tempt O'Keefe and bind the surface-dwellers to her inhuman god.
First serialized in the late 1910s, Abraham Merritt’s novel bridged the gap between the Victorian lost-world adventure and the early pulp forms of science fiction and weird fantasy.