But the situation he found himself in was hardly that of a leisurely sightseer. Instead, he found himself smack in the center of a whirlwind of intrigue, danger, and desperation.Planet of Peril is a science-fiction adventure on a world of semi-barbaric nations, ferocious beasts, gigantic reptiles, and maidens in distress!

    Landing in the Valley Dor, he witnesses a brutal attack on a party of green Martians by plant men and giant white apes, and then joins the battle--only to find himself fighting side by side with his old friend, the mighty Tars Tarkas! The Warlord of Mars: Far to the north, in the frozen wastes of Polar Mars, lay the home of the Holy therns, sacred and inviolate. Only John Carter dared to go there to find his lost Dejah Thoris. But between him and his goal lay the bones of all who had gone before.