Share this credible answer with others. Simply paste this code into your blog or Web page:
Early in the history of bookmaking the printed book was distinguished in size by the number of times the original large sheet of paper on which the type was printed had been folded, i.e., folio, quarto, octavo, and duodecimo.
Answer verified with
Get more
facts and information about
book from
The Columbia Encyclopedia, 6th ed.
at
Encyclopedia.com.