Bolos are huge self-aware robotic battle tanks/mobile fortresses. Throughout a very long history of wars and conflicts, they have served humanity selflessly.
After Laumer’s death, Baen thought to resurrect the Bolos with a series of anthologies featureing a variety of authors. There is some excellent, some good, and some less good, but the overall quality is surprisingly high. It is military SciFi in a very pure form, and many will probably be put off by this. I have read the first four books:
- Bolos Book 1 – Honor of the Regiment
- Bolos Book 2 – The Unconquerable
- Bolos Book 3 – The Triumphant
- Bolos Book 4 – Last Stand