THE INNER WORLD: A NEW THEORY SETTING FORTH THAT THE EARTH IS A HOLLOW SPHERE CONTAINING AN INTERNAL HABITABLE AND INHABITED REGION FREDERICK CULMER 1886
NIELS KLIM’S JOURNEY UNDER THE GROUND; BEING A NARRATIVE OF HIS WONDERFUL DESCENT TO THE SUBTERRANEAN LANDS; TOGETHER WITH AN ACCOUNT OF THE SENSIBLE ANIMALS AND TREES INHABITING THE PLANET NAZAR AND THE FIRMAMENT BARON LUDVIG HOLBERG 1741
NOTES FROM THE HANGAR (VOL 1, NO 1): THE UNDERGROUND BASE AT DULCE, SCIENTOLOGY, WILHELM REICH, AND THE BIOLOGICAL THEORY OF UFOS JIM KEITH 1991
THE NIGHT OF THE GODS; AN INQUIRY INTO COSMIC AND COSMOGONIC MYTHOLOGY AND SYMBOLISM JOHN O’NEILL 1893
TO THE NORTH: THE STORY OF ARCTIC EXPLORATION FROM EARLIEST TIMES TO THE PRESENT JEANNETTE MIRSKY 1934
