"Print on demand" technologies, which make it doable to print as couple as just one book at a time, have designed self-publishing (and Vainness publishing) less of a challenge and more affordable, and it has allowed publishers to keep minimal-selling books in print rather than declaring them from print. https://mylesksyei.ziblogs.com/38516473/the-2-minute-rule-for-books-and-books-online