The Moon Pool

When Dr. Walter Goodwin arrives on the island of Ponape, he finds his friend David Throckmartin shattered by tragedy: Throckmartin's wife Edith and their associate have vanished into the ancient ruins of Nan-Matal, drawn toward something called the Moon Pool. What began as a botanical expedition has become a descent into madness and mystery, marked by strange marks on Throckmartin's body and whispers of a subterranean world that defies explanation. Goodwin must venture back into those ruins, where he will discover an underground civilization of impossible wonders and awaken something far older and more terrible than any of them understood. The Dweller stirs in the deep, and its awakening threatens not just these isolated islands but the world above. Merritt blends scientific curiosity with supernatural dread in this foundational lost-world tale, crafting atmospheric horror that predates and influenced the cosmic terrors that would follow. For readers who crave adventure that breathes, who want their jungles rain-soaked and their ancient cities humming with wrongness, who understand that the most frightening thing is not what's in front of you but what lies beneath everything you thought you knew.