From the New York Times bestselling author of The Map of Time and The Map of the Sky, the final installment in the award-winning trilogy that The Washington Post called "a big, genre-bending delight."

When the person he loves most dies in tragic circumstances, the mysterious protagonist of The Map of Chaos does all he can to speak to her one last time. A session with a renowned medium seems to offer the only solution, but the experience unleashes terrible forces that bring the world to the brink of disaster. Salvation can only be found in The...