Explorer Academy: The Forbidden Island (Book 7)

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Cruz Coronado faces a race against time as he completes the final piece of a cipher while navigating dangerous missions across various continents, from Antarctica to Argentina. With threats from Nebula agents and a mysterious explorer spy looming, the urgency to recover his mother's groundbreaking formula intensifies. Having endured numerous high-stakes challenges, Cruz learns that true exploration demands perseverance. However, he is unprepared for a shocking revelation that awaits him, testing his resolve like never before.