Elements

240 pages first pub 2009 (editions)

nonfiction reference science funny informative slow-paced

235 pages first pub 2009 (editions)

nonfiction reference science informative lighthearted medium-paced

229 pages first pub 2014 (editions)

nonfiction reference science adventurous informative slow-paced

240 pages first pub 2017 (editions)

nonfiction science challenging informative slow-paced
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