As Irene, Kai and Vale pursue her would-be assassin, they uncover a plot even more insidious than usual. Someone is creating links between high-chaos worlds and Vale's world. Someone who wants Irene well out of the way - and will do anything to make this happen. The Dark Archive is the seventh book in the Invisible Library series by Genevieve Cogman. Book 7 in the dazzling bibliophilic series!