This book is Childress' thorough examination of the early hollow earth stories of Richard Shaver, and the fascination that fringe fantasy subjects such as lost continents, UFOs, and the hollow earth have had on people. Shaver's rare 1948 book, I Remember Lemuria is reprinted in its entirety, and the book is packed with illustrations from Ray Palmer's Amazing Stories issues of the 1940s. Childress discusses famous hollow earth books and delves deep into whatever reality may be behind the stories of tunnels underground.