Editing Book (section)

=== 19th century to present ===
Steam-powered printing presses became popular in the early 19th century. These machines could print 1,100 sheets per hour,<ref>{{cite news |last1=Bruckner |first1=D. J. R. |title=How the Earlier Media Achieved Critical Mass: Printing Press;Yelling 'Stop the Presses!' Didn't Happen Overnight |url=https://www.nytimes.com/1995/11/20/business/earlier-media-achieved-critical-mass-printing-press-yelling-stop-presses-didn-t.html |website=The New York Times |access-date=13 August 2020 |date=20 November 1995 |archive-date=July 1, 2017 |archive-url=https://web.archive.org/web/20170701112056/http://www.nytimes.com/1995/11/20/business/earlier-media-achieved-critical-mass-printing-press-yelling-stop-presses-didn-t.html |url-status=live }}</ref> but workers could only set 2,000 letters per hour.{{Citation needed|date=April 2011}} [[Monotype system|Monotype]] and [[linotype machine|linotype]] typesetting machines were introduced in the late 19th century. They could set more than 6,000 letters per hour and an entire line of type at once. There have been numerous improvements in the printing press. In mid-20th century, European book production had risen to over 200,000 titles per year.

During the 20th century, libraries faced an ever-increasing rate of publishing, sometimes called an [[information explosion]]. The advent of [[electronic publishing]] and the [[internet]] means that new information is often published online rather than in printed books, for example through a [[digital library]]. "[[Print on demand]]" technologies, which make it possible to print as few as one book at a time, have made self-publishing (and [[vanity publishing]]) much easier and more affordable, and has allowed publishers to keep low-selling books in print rather than declaring them out of print.