Douglas Hill 
World Of The Stiks 

An alien planet – and an evil trade . . .
EXTRA – an organization devoted to trade and exploration missions to alien planets. Thirteen-year-old Jonmac is part of the group who set up a base on the distant planet of Bregele II, home to…
THE STIKS – tall, spindly humanoids whose peaceful natures and primitive ways make them easy prey for…
THE DUSTERS – a group of vicious, ruthless criminals who offer the Stiks a dangerously addictive drug in return for their valuables.
As tension and fear spiral into an explosive and violent confrontation, Jonmac is plunged into a sudden, horrifying danger – and a terrible isolation. His only chance of survival is to win the trust of the Stiks…