The final volume in the The Library Trilogy, following THE BOOK THAT WOULDN'T BURN and THE BOOK THAT BROKE THE WORLD. The secret war that defines the library has chosen its champions and set them on the board The fate of an infinite library hangs on one book, a book that holds the power to break the unbreakable. In the face of such forces, fragile things like hearts, family, and the world seem certain to fail.

The people most vital to Livira are scattered across time and space, lost, divided into factions, in mortal peril. Somehow, she must bring them together and...