THE KINGDOM OF AGARTTHA: A JOURNEY INTO THE HOLLOW EARTH (MISSION DE L’INDE EN EUROPE)

A DWELLER ON TWO PLANETS

• FREDERICK SPENCER OLIVER
• 1905

THE HOLLOW EARTH;

• 1904

SHAMBHALA;

• NICHOLAS ROERICH
• 1930

THE HOLLOW EARTH

• RAYMOND BERNARD
• 1964

UNDER THE NORTH POLE: THE WILKINS–ELLSWORTH SUBMARINE EXPEDITION

• SIR GEORGE H. WILKINS
• 1931

THE HOLLOW GLOBE: OR, THE WORLD’S AGITATOR AND RECONCILER. A TREATISE ON THE PHYSICAL CONFORMATION OF THE EARTH BOOK

• M. L. SHERMAN
• 1871

EXPLORING WITH BYRD: EPISODES FROM AN ADVENTUROUS LIFE

• RICHARD E. BYRD
• 1937

KOLYMA: THE ARCTIC DEATH CAMPS

• ROBERT CONQUEST
• 1978

SYMMES’S THEORY OF CONCENTRIC SPHERES: DEMONSTRATING THAT THE EARTH IS HOLLOW, HABITABLE WITHIN, AND WIDELY OPEN ABOUT THE POLES

• JAMES MCBRIDE
• 1826