Winner of the 2016 Nebula Award for Best Novel

"The book is full of quirkiness and playful detail...but there's an overwhelming depth and poignancy to its virtuoso ending.' 'NPR 

From the former editor-in-chief of io9.com, a stunning Nebula Award-winning and Hugo-shortlisted novel about the end of the world'and the beginning of our future

An ancient society of witches and a hipster technological startup go to war world in order to prevent the world from tearing itself. To further complicate things, each of the groups' most promising followers (Patricia, a brilliant witch and Laurence, an engineering "wunderkind') may just be in love with each other.

As the battle between magic and science wages in San Francisco against the backdrop of international chaos, Laurence and Patricia are forced to choose sides. But their choices will determine the fate of the planet and all mankind.