E.C. Tubb 
Eloise 
The Dumarest Saga Book 12

Cyber Prime surveyed the domains of his vast scattered empire with trepidation. Central Intelligence had ruled the empire in the past. Now he knew that this gigantic computer was degenerating, breaking up after years of use.Only one man could save them: Earl Dumarest, a lonely space traveller engaged on a long quest to find his birth planet, Earth. The Cybers must find and intercept him.But before the Cybers discover Dumarest, they encounter Eloise, a beautiful seductress who drives logic from their minds . . .(First published 1975)