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In the Room of the Seven Doors, Carson Napier faced the choice of his life. Six doors led to terrible deaths - the seventh was the door of life. But for him, this door too would lead only to the new dangers of a planet whose beasts were more frightful than those of his native Earth.
But Carson sought the rescue of the planet's fairest princess, and even though he stepped from one danger to meet another, he was determined to make good an Earthman's pledge.
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