The Radio Gun-Runners — Ralph Milne Farley

A sequel to his previous Argosy novel, The Radio Flyers, author Ralph Milne Farley pens this science-fiction classic set in a hollow earth. Although compared favorably to Edgar Rice Burroughs' Pellucidar series, Farley's multi-layered tale of adventure at the earth's pole weaves gangsters and Norse Vikings into an offbeat tale never before reprinted.