chunk: The Dweller is in the habit of rising to the surface of the earth and capturing men and women which it holds in an unholy stasis and which in some wise feed it. It increases its knowledge and power constantly, but has a weakness, since it knows nothing of love. The scientist Dr. Goodwin and the half-Irish, half-American pilot Larry O'Keefe, and others, follow it down. Eventually they meet a woman, beautiful and evil, named Yolara, who in essence serves the Shining One, and the 'handmaiden' of the Silent Ones, beautiful and good, named Lakla. Both want O'Keefe and eventually battle over him.
  There is also a race of very powerful and handsome 'dwarves' and a race of humanoids whom the Silent Ones developed from a semi-sentient froglike species.