The inhabitants render his unfamiliar name as "Jandar." On Callisto, Jandar contends with monstrous creatures, savage insect men, barbarian hordes, sky pirates in flying ships, and the dangerous Mind Wizards of Kuur while seeking to rescue and win the heart of the beautiful princess Darloona of Shondakar (a homage to the similarly named Martian lost city in Leigh Brackett's The Last Days of Shandakor).
The residents refer to him as "Jandar." On Callisto, Jandar battles fearsome beasts, ferocious insect humans, brutal hordes, aerial pirates in flying vessels, and the perilous Mind Wizards of Kuur while attempting to rescue and capture the lovely princess Darloona of Shondakar (a nod to the similarly named Martian lost city in Leigh Brackett's The Last Days of Shandakor).