She had been innocent once, a little girl playing with feathers on the floor of a devil's lair. She wasn't innocent now . Around the world, black handprints are appearing on doorways, scorched there by winged strangers who have crept through a slit in the sky. In a dark and dusty shop, a devil's supply of human teeth grows dangerously low. And an art student named Karou wanders the tangled lanes of Prague, plagued by the sensation that she isn't whole. When one of the strangers - beautiful, haunted Akiva - fixes his fire-coloured eyes on Karou, she is swept away into a deadly war. Soon she must choose between the safety of her ordinary life and a dangerous world that holds the answers she has always sought . Star-crossed love, dangerous secrets, and deadly worlds collide in this sweeping fantasy adventure by a New York Times bestselling author.