A book called Sea of Glass by Barry B Longyear. I'd read one of his short stories 'Enemy Mine' that was later made into a movie and I searched out a few of his books - which vary widely. I eventually found Sea of Glass and it blew my mind away.
I read my paperback so much that it was practically falling to pieces, so I was over the moon whan I found a first edition hardback in gorgeous condion in Tucson for only $8.
Sea of Glass
Look, you've got it all wrong! You don't NEED to follow ME, You don't NEED to follow ANYBODY! You've got to think for your selves! You're ALL individuals!
Yes! We're all individuals!