3-9 ┊ 2909 words ┊ ◄))
3-9, 2909 words, 20 minutes audio time.
Ninja warriors were masters of stealth and disguise. They could quickly defeat their enemies without raising the alarm. They may not have realized it, but they owed their success to science. Engaging text, fascinating photos, and useful illustrations will help young readers understand how science helped ninjas successfully achieve their secret missions.
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