Breakout! by Shoo Rayner
Poor Onlee One and his friends have been captured, and taken to Planet Pen - a special prison planet. where the cruellest torture is constant running on the treadmill! Dark Claw has big plans for Onlee One. He is determined to get him, and his irritating companions. And it looks like Dark Claw has a new and surprising ally in the form of the Brandling. Can Onlee One get himself and his friends out of this sticky situation in time?