Challenge of the Unknown

Perry Rhodan is on a secret mission on a planet of Arkonide descendants. With him, on a mile-long 'liberated' space battleship is the extraordinary Pucky, and the imperious Thora. But new mysteries arise on the planet Zalit. The Zalites are coppery-skinned aliens with copper-green hair. Their planet has become the base of the 'Watchdogs' – telepathic, marine, methane-breathing creatures from another world who establish themselves on Zalit for unknown purposes. What are their aims? Are they malevolent? A new and fantastic challenge for Perry Rhodan and his mutant allies…