Here some cover versions of the science fiction trilogy "Battle Circle" by Piers Anthony. The covers are by the British artist Patrick Woodroffe.
In an post-apocalyptic world people settle their conflicts with highly ritualized combat in a so called "battle circle". Each warrior wears as second name the weapon he wields. And so the books are name after their protagonists:

Sos the Rope (1968)

Var the Stick (1972)

Neq the Sword (1975)
It’s good old thrilling action stuff, like those novels were in these times paving the way for the Road Warrior and others to come.