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208 pages first pub 2001 (editions)

nonfiction history science adventurous challenging informative slow-paced
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178 pages first pub 2001 (editions)

nonfiction history science adventurous challenging informative slow-paced

200 pages first pub 2001 (editions)

nonfiction history science adventurous challenging informative slow-paced

missing duration info first pub 2001 (editions)

nonfiction history science adventurous challenging informative slow-paced