'The Water Knife'

In Paolo Bacigalupi’s new novel, water is as good as money. Those with it are rich, and those who live in lands that have dried up are destitute. Or dead. The Water Knife paints a picture of a very-near future in which Texans are living in refugee camps in Phoenix and you need a passport to cross into California from Arizona. Madeleine talks to the author about his dystopian vision.