Carthoris tried to support Thuvia, but himself commenced to slide and slip toward the ever-enlarging aperture. Better to cling to the smooth stone he kicked off his sandals of zitidar hide and with his bare feet braced himself against the sickening tilt, at the same time throwing his arms supportingly about the girl. In her terror her own hands clasped about the man's neck. Her cheek was close to his. Death, unseen and of unknown form, seemed close upon them, and because unseen and unknowable infinitely more terrifying. "Courage, my princess," he whispered cheeringly. Edgar Rice Burroughs created one of the most iconic figures in American pop culture, Tarzan of the Apes, and it is impossible to overstate his influence on entire genres of popular literature in the decades after his enormously winning pulp novels stormed the public's imagination. Thuvia, Maid of Mars, first published in 1920, is the fourth book in Burroughs' Mars series. Here, hero Carthoris goes in search of the kidnapped Thuvia, princess of Ptarth, encountering strange Martian creatures and romantic rivals along the way. American novelist EDGAR RICE BURROUGHS (1875-1950) wrote dozens of adventure, crime, and science fiction novels that are still beloved today, including Tarzan of the Apes (1912), At the Earth's Core (1914), A Princess of Mars (1917), The Land That Time Forgot (1924), and Pirates of Venus (1934). He is reputed to have been reading a comic book when he died.