The Golden City

Ralph Milne Farley was originally the pen name of Roger Sherman Hoar. Later his daughter Caroline joined him in collarboration in the stories. I believe that finally she was the sole contributor to the Farley name.

It was Adams Mayhew against the Spider, mad genius of Mu - with the existence of that lost Pacific continent at stake.

This is a novel of the lost continent of Lemuria by the author of the Radio Man series of Venus stories and many other science fiction adventure tales.