Volcanoes around the world have their own legends, and many have wrought terrible devastation, but none has caught the imagination like Vesuvius. We now know that immense eruptions destroyed Bronze Age settlements around Vesuvius, but the Romans knew nothing of those disasters and were lulled into complacency—much as we are today—by its long period of inactivity. None of the nearly thirty eruptions since AD 79 has matched the infamous cataclysm that destroyed Pompeii and Herculaneum within hours. Nearly two thousand years later, the allure of the volcano remains—as evidenced by its...