Claire, rakish Hero, angel Rami, and muse-turned-librarian Brevity have accomplished the impossible by discovering the true nature of unwritten books. But now that the secret is out, in its quest for power Hell will be coming for every wing of the Library. To protect the Unwritten Wing and stave off the insidious reach of Malphas, Claire and her friends will have to decide how much they're willing to sacrifice...
The final book of the bestselling fantasy trilogy.