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324 pages first pub 2006 (editions)

nonfiction science challenging informative slow-paced
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330 pages first pub 2006 (editions)

nonfiction science challenging informative slow-paced

330 pages first pub 2006 (editions)

nonfiction science challenging informative slow-paced

259 pages first pub 2006 (editions)

nonfiction science challenging informative slow-paced