We all know that without water we couldn't survive, and that sometimes a cup of coffee or a glass of wine feels just as vital. But do we really understand how much we rely on liquids, or the destructive power they hold? Set over the course of a flight from London to San Francisco, Mark Miodownik's in-depth guide is a fascinating tour of these formless substances, told through the language of molecules, heartbeats, and ocean waves. From a cup of tea to a liquid crystal display screen and from the volcanoes of Iceland to the frozen expanse of Greenland, we come to see liquids as sources of wonder, but also to understand their potential for death and destruction.