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338 pages first pub 2010 (editions)

nonfiction science challenging informative slow-paced
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338 pages first pub 2010 (editions)

nonfiction science challenging informative slow-paced

328 pages first pub 2010 (editions)

nonfiction science challenging informative slow-paced

421 pages first pub 2010 (editions)

nonfiction poetry science challenging informative slow-paced