This is among the first and rarest of the Hollow Earth books. In the early 19th century, John Cleves Symmes proposed that the earth was actually a set of five nested spheres, each with polar openings. He unsuccessfully lobbied congress to fund an expedition to the poles to investigate this theory. This novel, based on Symmes' theories, was published in 1820. Some believe that Symmes was the author, but this has not been established beyond a shadow of doubt.

Probably the first US utopian science fiction novel, Symzonia is also a classic sea yarn. The narrator, Mr. Seaborn, initiates just such an expedition as Symmes dreamed of. With a special high-tech paddle boat, built with no metal to avoid magnetic effects, Seaborn sets out on a voyage into uncharted southern waters. Conflict is provided by a mutinous Mr. Slim, who proves to be Seaborn's nemesis. Eventually the ship penetrates into the Antarctic hole, and voyages deep into the inner surface of the earth, which Seaborn claims for the US and calls 'Symzonia'. They encounter a utopian society, run by a benevolent aristocracy, which has long since banished all of their misfits to a distant colony, and possibly the outside Earth. The Symzonians have advanced airships, boats with jet propulsion, flame-proof cloth woven from spiderwebs, and a mysterious weapon of mass destruction. Eventually, they expel Seaborn and his crew back to the exterior world. Due to a series of accidents, all material evidence of Symzonia is lost on the return voyage, and Seaborn is swindled out of his profits.

Edmond Halley, the famed astronomer, was the first to propose that the Earth contained a set of nested hollow spheres. Symme's theory, and this book in particular, was likely one of Poe's primary influences, particularly seen in his Narrative of Arthur Gordon Pym. The rumor of a hidden advanced civilization inside the earth has long been elaborated in fictional and occult books from Bulwer-Lytton to the the Shaver Mystery.

Errata

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