Cold Steel — Keith Laumer

THE THIN STEEL LINE

Spreading throughout the galaxy, the human race finds that some of its new neighbors are very unfriendly. But when threats arise, the humans know what to do: Break out the Bolos!

Gigantic tanks, with enough firepower for an army, controlled by a human-level artificial intelligence, and programmed to defend their creators at all costs, the Bolos have been decisive factors in battle since the time centuries ago when humans still warred with each other. Now they battle on star systems across the galaxy to defend us all.

The dangers are great, but the Bolos are faithful and fearless. And though Bolos can sometimes be destroyed, they never surrender! The saga of Keith Laumer's greatest creation, the Bolo continues. And though the Bolos are formed from cold steel, they have warmer hearts than many of the flesh-and-blood creatures they protect.