Tarzan at the Earth's Core by Edgar Rice Burroughs

The lake of the Horibs lies at a considerable distance from the eastern end of the mountains of the Thipdars, perhaps five hundred miles, and where there is no time and distances are measured by food and sleep it makes little difference whether places are separated by five miles or five hundred.The time has come to read the thirteenth Tarzan book and the fourth Pellucidar book, Tarzan at the Earth's Core. Today's subject first appeared as a seven-part serial in Blue Book, spanning September 1929 to March 1930. I'm reading a 1970s Ballantine edition with a Neal Adams cover. (I actually saw a print of Adams' cover illustration, signed by Adams himself, at an antique store a few years ago.) You can see that Adams tried to reproduce the unique sky of Pellucidar in the background of painting--as every schoolboy knows, Pellucidar is the world on the inner surface of the Earth's crust, so there is no conventional horizon, you just see the surface geography of your inner world curving…