Pellucidar — (1922-1944) At the Earth’s Core with illustrations. At the Earth’s Core is a 1914 science fiction novel by Edgar Rice Burroughs, the first in his series about the fictional “hollow earth” land of Pellucidar. It first appeared as a four-part serial in All-Story Weekly from April 4–25, 1914. It was first published in book form in hardcover by A. C. McClurg in July, 1922.

1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)1. At the Earth's Core (1922) 2. Pellucidar (1923) 3. Tanar of Pellucidar (1929) 4. Tarzan at the Earth's Core (1930) 5. Back to the Stone Age (1937) 6. Land of Terror (1944) 7. Savage Pellucidar (1941)

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