Simon du Fleuve

Simon du Fleuve is a post-apocalyptic French graphic novel series written by Claude Auclair, with five volumes published between 1976–1978, and a second cycle of four albums from 1988-1989. Simon du Fleuve started in the pages of Tintin magazine. The heirs of Jean Giono have stated that elements of the story are stolen from Giono's Le chant du monde. 

At least three albums have been published in English so far:
 * Simon of the River 1 - Clan of Centaurs
 * Simon of the River 2 - Slaves
 * Simon of the River 3 - Mailis