Servants of the Wankh

Actual title: The Wannek.

Marooned on the strange planet Tschai, Adam Reith agreed to lead an expedition to return the princess Ylin Ylan, the Flower of Cath, to her homeland halfway around the globe.

Monsters of land and sea lay before them, and begins both human and alien who might rob, kill or enslave them. Tschai was a large planet, an ancient planet, where four powerful alien roces struggled for mastery while humans were treated as pawns; nothing would be easy for Reith on this journy. But the girl's father was enormously wealthy and her homeland technologically sophisticated.

If Reith was ever to obtain human aid in returning to Earth, where better than Cath? If he could get there...