Arch Enemy by Frank Beddor

Alyss Heart, now struggling to preserve a fragile peace between Wonderland and the real world, must confront the resurgence of a ruthless usurper who will stop at nothing to reclaim power; as old alliances are tested and hidden betrayals surface, Alyss and her allies race against escalating chaos that threatens to merge the two worlds, forcing them into a final battle to protect their people and the very nature of imagination.

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