'The Phantom of the Poles' expounds William Reed's theory that
the poles were unreachable because they were non-existent and
instead there were entrances, at the Earth's axis, to its hollow
This is a view which has been offered by others (often in rather
different form) both before Reed and right up to the present day.
The unorthodoxy of the view on its own makes this an interesting
read, while Inner Earth theorists may find notions worthy of
Reed was apparently trying to raise interest in mounting an
expedition to explore the economic potential of the inner Earth.