R6. L'Étoile du sud (The Vanished Diamond) - Jules Verne [Greek]
I have a very soft spot for this one. I can't place the reason why; there's nothing very extraordinary about it, I think. But it has a good plotline with the necessary twists of events to keep you interested, it's not heavy on the science as other of his works are, and the protagonist is a very nice and likable young man. So, why not.
