Ace Books, 1989. Mass market paperback original; first in a series of six novels written by various authors and loosely connected to Isaac Asimov's "Robot" series.

Ariel follows her lover, Derec, to a planet of robots, where Derec is summoned to solve the mystery of the robots and aliens before a robot war erupts

The machinery of Robot City has gone mysteriously awry, and Derek, who has only recently returned, is determined to locate and eliminate the source of this distressing reprogramming

Derec has restored the original Robot City, but now three subversive robots of his mother's creation are urging a robot revolution that threatens to destroy his father's city

TERRIFIC PAPERBACK FROM 1990! FIRST ACE EDITION! AMAZING SHAPE FOR ITS AGE! MANY PHOTOS ATTACHED! NO EDGE WEAR! SPINE HAS ONE CREASE AND A SMALL DING AT THE BOTTOM BINDING IS GREAT, STILL TIGHT! ALL ORDERS SHIP SAME DAY WITH TRACKING NUMBERS! clstwll

Amnesiac Derec, on a galaxy-wide quest for his identity, stumbles upon Ariel Burgess and Dr. Avery, the same man who had obliterated his memory.