About the book: 1899 / "...You see before you a man who almost became a victim of a crystal! And I was exposed to this danger because I was neither a scientist nor an artist yet... But this is too long a story..." The hero-narrator, Alexis Hartz, carried away by his cousin Laura, makes a journey through the polar countries together with her father, the mysterious half-mad scientist Nazias , in order to reach a place from where you can penetrate into the hollow Earth hiding precious crystals.