An explosive revelation and a familiar face in the sixth book in this adventure-packed series.



Still reeling from the life-changing discovery he found buried in the mysterious archive, Cruz Coronado grapples with an important secret as the gang heads to China in search of the second-to-last piece of the cipher. Under the watchful eye of a new adviser, life on the ship returns to almost normal...almost.


Just as things seem to be going smoothly, a familiar face shocks Cruz back into reality, and the final piece in this life-and-death scavenger hunt veers toward a dead end.


Explorer Academy features:
* Gripping fact-based fiction plot that inspires curiosity with new technology and innovations
* Amazing inventions and gadgets
* A cast of diverse, relatable characters
* Secret clues, codes, and ciphers to track down within the text
* Vibrant illustrations
* Elements of STEAM
* National Geographic explorer profiles in The Truth Behind Section

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