Silent as the shadows through which he moved, the great beast slunk through the midnight jungle, his yellow-green eyes round and staring, his sinewy tail undulating behind him, his head lowered and flattened, and every muscle vibrant to the thrill of the hunt. The jungle moon dappled an occasional clearing which the great cat was always careful to avoid. Though he moved through thick verdure across a carpet of innumerable twigs, broken branches, and leaves, his passing gave forth no sound that might have been apprehended by dull human ears.

At the Earth's Core is a 1914 fantasy novel by Edgar Rice Burroughs, the first in his series about the fictional "hollow earth" land of Pellucidar. Pellucidar is inhabited by prehistoric creatures of all geological eras, and dominated by the Mahars, a species of flying reptile both intelligent and civilized, but which enslaves and preys on the local stone-age humans. Innes, David Innes is a mining heir who finances the experimental "iron mole," and Perry are captured by the Mahars' ape-like Sagoth servants and taken with other human captives to the chief Mahar city of Phutra. Among their...

At the end of the first book, A Princess of Mars, John Carter is unwillingly transported back to Earth. The Gods of Mars begins with his arrival back on Barsoom (Mars) after a ten-year separation from his wife Dejah Thoris, his unborn child, and the Red Martian people of the nation of Helium, whom he has adopted as his own. Unfortunately, Carter materializes in the one place on Barsoom from which nobody is allowed to depart: the Valley Dor, which is the Barsoomian afterlife.

The Efficiency Expert is a 1921 novel by Edgar Rice Burroughs. One of a small number of Burroughs' novels set in contemporary America as opposed to a fantasy universe, The Efficiency Expert follows the adventures of Jimmy Torrance as he attempts to make a career for himself in 1921 Chicago.