The 39 Clues - Book 3 Countdown
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In Countdown, the third installment of the Unstoppable arc in The 39 Clues series, siblings Amy and Dan Cahill race against time in the ancient city of Tikal, Guatemala. With Dan critically injured and an ominous plague threatening the world, Amy must make a desperate choice to save her brother—and possibly unleash a greater evil. Packed with suspense, historical intrigue, and unexpected twists, this action-packed installment deepens the stakes in their global quest.
Key Features:
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English language
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Hardcover format
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192 pages
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Full-color maps and illustrations
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Incorporates historical and archaeological settings (e.g., Maya ruins)
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Epic adventure blending puzzle-solving with family drama
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Suitable for readers aged 9–14 (grades 3–7)