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360 pages first pub 2014 (editions)

nonfiction science informative medium-paced
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288 pages first pub 2014 (editions)

nonfiction science informative medium-paced

288 pages first pub 2014 (editions)

nonfiction science informative medium-paced

288 pages first pub 2014 (editions)

nonfiction science informative medium-paced

301 pages first pub 2014 (editions)

nonfiction science informative medium-paced

248 pages first pub 2014 (editions)

nonfiction science challenging informative slow-paced

286 pages first pub 2014 (editions)

nonfiction science challenging informative slow-paced

9 hours, 2 minutes first pub 2014 (editions) user-added

nonfiction science informative medium-paced