Attack from the Unseen

INVISIBLE ASSAILANTS!Attacking an entire world! Kidnapping—or killing?—the inhabitants of a whole planet! Today, Mirsal 3—tomorrow, other worlds of the Arkon Imperium?Of the Solar Empire?The Robot Regent of Arkon wants its domain protected from the invisible invaders. And Perry Rhodan is determined that they shall not threaten Earth and its companion worlds. You will be caught up in a whirlwind of excitement and a tornado of terror when you get involved in THE 57th PERRY RHODAN EPISODE , a masterpiece of mystery & menace worthy of our half-a-hundred issues Hallmark.  It all comes together with hurricane force in—ATTACK FROM THE UNSEEN!