There are doomsday scenarios we've all considered—a tsunami, for instance, or a cataclysmic hurricane. But what about an asteroid strike? A robot takeover, or even an alien invasion? How Stuff Works author Marshall Brain takes a deep dive into all these scenarios and more, detailing the science behind each one and how we might prevent or prepare for it. With photos and fun graphics, this is the book to have with you no matter what may come.