Hidden World

Originally published as a magazine serial in Wonder Stories in 1935 as In Caverns Below. "Underground armies battling with fantastically destuctive weapons." 4.25 x 7 softcover with 127 pages. Airmont #SF6. Clean and crisp copy, some mild browning of pages and edgewear. Original price sticker on front cover.
  • Hidden World
  • Staton A. Coblentz
  • Airmont Books, 1964