Publisher's Synopsis
The author's friend Jason Gridley is experimenting with a new radio frequency he dubs the Gridley Wave, via which he picks up a transmission sent by scientist Abner Perry, from the interior world of Pellucidar at the Earth's core, a realm discovered by the latter and his friend David Innes many years before. There Innes and Perry have established an Empire of Pellucidar, actually a confederation of tribes, and attempted with mixed success to modernize the stone-age natives. Lately things have not gone well, and Innes is currently held captive in an enemy realm. Perry transmits a lengthy account of how this has come about, as reported by Innes's native comrade in arms Tanar, and appeals for aid from the outer world.Tanar's narrative comprises the bulk of the novel. Innes had led an army to the relief of the member tribe of Thuria and the remnants of the Empire's former foes, the reptilian Mahars. Both had been attacked by a previously unknown people, the Korsars (corsairs), the scourge of the internal seas. These, it is eventually learned, are the descendants of outer world Moorish pirates who had penetrated Pellucidar centuries before through a natural polar opening connecting the outer and inner worlds. The empire's forces succeed in repulsing the Korsars, but the raiders retain as hostage Tanar, son of Innes' ally Ghak of Sari. They hope to trade him for the secret of the empire's superior weaponry. Leaving his forces to construct ships to counter the enemy fleet, Innes and his comrade Ja of Anoroc set out alone to rescue Tanar, guided by their own prisoner, the Korsar Fitt.
