In swarming hordes they poured forth from the core of the Nebula: the
shadowflashers - nightmarish parasites bent on enslaving the minds and
bodies of the entire human race. Already they had killed the Keeper of
the Peace, and stolen the great secret weapon AKKA. Now nothing stood
between mamkind and ultimate destruction...
It was Jil Gyrel who first sensed the danger. Daughter of a lost Legion pilot, Jil had inherited her father's uncanny gifts of nabigation - and his courage. But what was one girl's bravery against the most monstrous evil ever to emerge from the treacherous oceans of space?
Jack Williamson (John Stewart Williamson, 1908–2006) was an American science fiction author.
Jack Williamson has been in the forefront of science fiction since his first published story in 1928. Williamson is the acclaimed author of The Humanoids and The Legion of Time. He is considered to be "The Dean of Science Fiction".
Jack Williamson. Wikipedia.