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Five hundred miles beneath the surface of the Earth lies another world-a world of eternal day and endless horizons, in which dinosaurs still roam and cavemen hunt and terrors forgotten in the outer world still survive. Lieutenant von Horst, member of an exploring expedition, was left behind in this lost land of Pellucidar. BACK TO THE STONE AGE is the thrilling story of his perilous adventures, along with the cavegirl he loved, in that primitive unknown world.
Edgar Rice Burroughs was a prolific American author of the 'pulp' era. The son of a Civil War veteran, he saw brief military service with the 7TH U.S. Cavalry before he was diagnosed with a heart problem and discharged. After working for five years in his father's business, Burroughs left for a string of disparate and short-lived jobs, and was working as a pencil sharpener wholesaler when he decided to try his hand at writing. He found almost instant success when his story 'Under the Moons of Mars' was serialised in All-Story Magazine in 1912, earning him the then-princely sum of $400.
Burroughs went on to have tremendous success as a writer, his wide-ranging imagination taking in other planets (John Carter of Mars and Carson of Venus), a hollow earth (Pellucidar), a lost world, westerns, historicals and adventure stories. Although he wrote in many genres, Burroughs is best known for his creation of the archetypal jungle hero, Tarzan. Edgar Rice Burroughs died in 1950.
For more information see www.sf-encyclopedia.com/entry/burroughs_edgar_rice