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330 pages hardcover 2013

nonfiction science challenging informative slow-paced
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330 pages paperback 2013

nonfiction science challenging informative slow-paced

330 pages 2013

nonfiction science challenging informative slow-paced

353 pages digital 2013 user-added

nonfiction science challenging informative slow-paced

10 hours, 35 minutes audio 2013 user-added

nonfiction science challenging informative slow-paced

392 pages paperback 2013

nonfiction science challenging informative slow-paced