In the 22nd century a combination of computer-augmented bio-feedback and chemo-therapy techniques has given man the ability not only to heal himself, but to change himself - to alter his very shape at will. But Form Change has its darker aspects, ranging from unautorized experimentation on human subjects to a threat to the very essence of humanity - a SIGHT OF PROTEUS.
Sheffield has written a thrilling novel of pursuit and unveiling in a world where the froms of humanity are practically boundless - until one man breaks an unbreakable law; until an alien force looses itself upon the world - and a planet that exploded sixteen million years ago delivers its final legacy...