Robotkjemperen Magnus år 4000 [Robotserien] #3

In "Mannen som samlet på planeter," astronomer Bradley Wells finds himself caught in a cosmic crisis when the alien Sardor abducts him to shrink and plunder entire planets for their elemental riches. With quick thinking and daring, Wells turns the tables on his captor, using his wits to restore the planets to their rightful sizes and positions before making his way back to Earth.