Keraban the Inflexible Adventures in the Euxine

Keraban is determined not to pay the tax required to cross the Bosphorus by boat, so he journeys by land around the Black Sea. There is a fundamental mistake in dividing Verne's works into science fiction vs. non-science fiction -- in Verne's work there is an all-encompassing vision of science, progress, society and political struggles, which it is not convenient to compartmentalize.