Computers are increasingly important, and public companies are often taking over roles reserved for government agencies in the 50's. Even the comments about not really understanding how hard it is to produce really random data is all spot on. What was missed of course was the fact computer prices would drop as fast as they grew more powerful, union/mob style gangsters would go out of fashion and ESP wouldn't pan out at all.
David Innes, a man with a remarkable story to tell, is a mining heir who finances an experimental "iron mole," an excavating vehicle designed by his elderly inventor friend Abner Perry. In a test, they discover the vehicle cannot be turned. It burrows 500 miles into the Earth, emerging into the unknown interior world of Pellucidar.
How could this man awaken with no past--no childhood--no recollection except of a vague world of terror from which his mother cried out for vengeance and the slaughter of his own people stood as a monument of infamy?
A room in San Francisco where strange things happened -- or a doorway into another cosmos, a different world, or perhaps the key to the past or future?