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Unlocked 8.5 (Keeper of the Lost Cities) is a companion instalment in Shannon Messenger’s New York Times bestselling series. Presented as Book 8.5, it continues the sequence in an alternative format and includes substantial additional material.
This extra-special entry picks up directly after Legacy’s cliffhanger, while shifting the storytelling through alternating chapters from Sophie and Keefe. The approach offers added insight into both characters as the wider saga moves forward with major revelations and new twists.
Alongside the narrative, a comprehensive guide expands on the world of the Lost Cities with newly revealed character and setting details. Readers will also find a detailed map, full-colour artwork, black-and-white illustrations, and additional bonuses, created for fans of the series.
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