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8 hours, 7 minutes first pub 2018 (editions) user-added

nonfiction science challenging informative slow-paced
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288 pages first pub 2018 (editions)

nonfiction science challenging informative slow-paced

288 pages first pub 2018 (editions)

nonfiction science challenging informative slow-paced

276 pages first pub 2018 (editions)

nonfiction science challenging informative slow-paced