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Ray Jayawardhana

4 books

256 pages first pub 2013 (editions)

nonfiction science challenging informative fast-paced

255 pages first pub 2011 (editions)

nonfiction science adventurous informative slow-paced

40 pages first pub 2020 (editions)

nonfiction childrens informative reflective medium-paced

280 pages first pub 2011 (editions)

nonfiction science adventurous challenging informative slow-paced