PLANET X - known to its inhabitans as Xylos - is the "lost" planet between Mars and Jupiter, several hundred million years ago.

Colonel DONOVAN HAWKE, a 21st Century American astronaut, is stranded there after his spacecraft passes through an unclassified spatial-temporal anomaly.

Upon his arrival on the jungle planet, he is quickly embroiled in adventures with the planet's savage predators and its humanoid inhabitants.

Among the latter of KAIN and VALKIA, of the deadly aerial STRATO-PIRATES and AEON, a diminuitive immortal. But most notably, there's the gorgeous and courageous alient princess, ODYRI, who wins the Earthman's heart.
"Perils on Planet X is everything I wanted Edgar Rice Burroughs A Princess of Mars to be."
-Michael May
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