A mix of romance, melodrama, and thrilling heroic science adventure. Ridiculously talented and good-hearted hero, completely colorless love interest, but lots of bizarre incident, fun supporting characters, and brilliant descriptions of the chemical and geological and engineering considerations that go into coal mining. It also made me acutely aware of my ignorance: the novel's backdrop consists of tensions between the Austrianized Hungarian nobility, Austrian imperial government, and Western European financial world on the one hand, and the native Hungarian land and people on the other. The memory of the abortive attempt at revolution, for example, is regularly referenced, and I constantly suspected that there was a good deal a more knowledgable audience would be able to read into the names and the brief references to places, events, allegiances, and cultural habits.