Counterprobe

From the front flap of the Tor first edition: "When Dr. Kevin Blake was first given the care of Jane Doe, he treated her as the simple amnesiac she seemed to be. Found nearly starving and without clothes in the Minnesota winter, Jane was an apparent, innocent, struggling to recapture her past and gain a foothold on her future. But Jane's case was not so simple. Not only had Kevin crossed the intense psychological boundaries sealing the secrets of Jane's shrouded past, he had also encountered an unknown far more terrifying. Jane was a probe, sent from another world to glean information about earth. She possessed extraordinary telepathic powers - powers that could kill in a flash of fiery intensity. Yet Jane was human - not alien - a living instrument used merely as an information-gathering tool by the aliens. And as Kevin unlocked the very humanness of Jane's soul, he crossed the boundary of his own self-reluctance and fell in love with Jane. Kevin has thus far protected Jane from local police and outwitted the ruthless government agents who had their own plans for Jane's amazing powers. He had valiantly fought, and seemingly won, her freedom from the aliens who called her back. Now Kevin and Jane are on the run again, once more fugitives from those who so desperately seek to harness Jane's powers. Those, like the unethical Dr. Eric Nordstrom, who has his own reasons for destroying Kevin Blake and wanting to see Jane die. And they face their most formidable foe of all - those from beyond who have returned with a sinisterly simple solution for calling their probe home."