E.C. Tubb 
Mimics of Dephene 
Cap Kennedy Book 15

QUARANTINED PLANET"On Dephene, the native life -form is peculiar and unique. All protoplasmic life is equal to and one with the mimics." On screen, the shape changed, altered into the shape of a man.Then it changed. It shrank, dropped, lifted a snouted head in the semblance of a dog. It grew, spread wings and became a large bird which hopped and pecked. The wings vanished and a tall and lovely woman smiled from where the bird had halted. A dozen changes, a score until the mind reeled."These Mimics represent a threat to every world in the entire galaxy. Their power of mimicry would enable them to adopt the outward form of rulers and high officials. A man could never be certain that his companion was what he seemed to be."When Kennedy went to Delphene the speculation became pure nightmare, for both he and his crew were being duplicated over and over — and so was the worlds-conqueror he sought to block.