All 8 volumes of the original EXTERUS are available from Amazon at the following links:

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https://www.amazon.com/dp/1511691875

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https://www.amazon.com/dp/1515137279

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https://www.amazon.com/dp/1519724500

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https://www.amazon.com/dp/153751671X

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https://www.amazon.com/dp/1539962997

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https://www.amazon.com/dp/1544060637

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https://www.amazon.com/dp/1719236003

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https://www.amazon.com/dp/1093894393