GUARDIANS OF THE GALAXY
The onslaught of the Melconians was not the last conflict that humanity's interstellar Concordiat would have to face. For now the Kezdai--a newly encountered species with war at the center of their philosophy--have taken to arms against the Concordiat and its colony worlds. For war, the Terrans have only one answer:
Break out the Bolos!
Self-aware robotic tanks, the Bolos have fought bravely and well since the days when humans fought each other. Now they battle across the stars to defend us all . . . and though the times are perilous, we've never been in better hands than those of our old metal guardians: Keith Laumer's greatest creation, the Bolos.
This is #5 in Bolos Series.