Knight to Planet 3

From the Back Cover: A Diabolical plan unfolds! Knunds hold master-eater Lad Captive! As Khund forces raid three planets in UP territory, a duplicate Computo (the sentient computer) forges an alliance between the Khunds, the villian Tyr, and himself. These unrelated events comprise a plot to achieve universal conquest. But for whom? WHO CONTROLS THE PIECES IN THIS INTRICATE GAMBIT?