13-14 years old

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Why? Capitalism, Socialism, Democracy (Why? Humanities Classics 23)
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Why? Jeong Yak-yong’s Mokmin’s Heart Book (Why? Humanities Classics 3)
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Why? Earth's Catastrophe (Why? Science 100)
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Why? Charles Darwin Origin of Species (Why? Humanities Classics 11)
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why? 30 must-read books recommended for upper elementary school students
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Why? Plato's Republic (Why? Humanities Classics 6)
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Why? Korean History Series (total 40 volumes)
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Why? Korean History Series (total 41 volumes)
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Why? Korean history series multi-set (total 10 volumes) - old edition
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Why? Korean History: People who overcame hardships (Why? Korean History 36)
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Why? Korean History: Goryeo Dynasty (Why? Korean History 3)
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Why? Korean History: Science and Medicine (Why? Korean History 7)
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Why? Korean History: Palace Stories (Why? Korean History 13)
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Why? Korean History: Naturalized Figures (Why? Korean History 27)
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Why? Korean History: Cheongbaekri, who brought glory to the country (Why? Korean History 37)
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Why? Korean History: Great Prime Ministers and Loyalists (Why? Korean History 19)
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