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238 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced
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240 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced

161 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced

176 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced

240 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced

176 pages first pub 2007 (editions)

nonfiction science adventurous informative medium-paced