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198 pages first pub 2000 (editions)

nonfiction science informative inspiring tense medium-paced
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240 pages first pub 2000 (editions)

nonfiction science informative inspiring tense medium-paced

240 pages first pub 2000 (editions)

nonfiction science informative inspiring tense medium-paced

missing page info first pub 2000 (editions)

nonfiction science informative inspiring tense medium-paced

224 pages first pub 2000 (editions)

nonfiction science informative inspiring tense medium-paced