Planet of no return

I preferred this to the first one, marginally. The concept of robots fighting a war all their own has been done to death, though here there's a twist on the idea. The female is made much of here, perhaps more than in the initial title, which is maybe a sign of the times but does stand out somewhat today.

What I can't understand is why there aren't more of these books. They're short, would work serially and, really, are no worse than many other pulp series. Even without Brion, there are surely plenty of Anvharians about, Brion's only defining characteristic is his being Empathetic. Some series work and some don't, I guess.