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536 pages first pub 2011 (editions)

nonfiction science informative slow-paced
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missing duration info first pub 2011 (editions)

nonfiction science informative slow-paced

560 pages first pub 2011 (editions)

nonfiction science informative slow-paced

missing duration info first pub 2011 (editions)

nonfiction science informative slow-paced

416 pages first pub 2011 (editions)

nonfiction science informative slow-paced