Zac Power's next mission is in one of the deepest oceans in the world. Even GIB's subs can't handle the depth. But the enemy has invented a new sub that can dive deeper then ever before. Can Zac find the enemy, and protect the top-secret information stored on the seabed?
How it feels
MoodPlayful
How it reads
Plot intensityEventful
Worth knowing
Written forMiddle grade
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