They are a fun read. Complete civilizations, geography, the works.
Oh, and yes, there are castes, more like royalty, merchants, swords, slaves, farmers. Whoever described it as ‘bdsm’, did not know their arse from their navel.
And ... there are ‘priest kings’, living very, very secluded lives, overseeing the whole show!
Tarl Talbot, much like ‘John of Mars’, has a ‘talisman’ that is employed, when he ‘is needed’ on Gor, (so sez ye priest king).
I said, its a many novel fun read.