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272 pages first pub 2010 (editions)

nonfiction childrens science adventurous informative lighthearted slow-paced
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missing page info first pub 2010 (editions)

nonfiction childrens science adventurous informative lighthearted slow-paced

272 pages first pub 2010 (editions)

nonfiction childrens science adventurous informative lighthearted slow-paced