The water coming out of your kitchen tap is four billion years old and might well have been sipped by a Tyrannosaurus rex. Unlike most precious resources, water cannot be used up; it can always be made clean enough again to drink - indeed, water can be made so clean that it's toxic. Water is the most vital substance in our lives but also more amazing and mysterious than we appreciate. As Charles Fishman brings vibrantly to life in this surprising and mind-changing narrative, water runs our world in a host of awe-inspiring ways, yet we take it completely for granted. But the era of easy water is over.