<P> These editions are typically library editions but the font size of the text is much larger than usual so that persons with poor eyesight (often older persons) can more easily read the book . The large print books tend to be of a uniform size . </P> <P> A critical edition is a scholarly publication, containing commentary, critique, and sometimes a full developmental history of the work from all available sources . </P> <P> Each batch of copies printed is termed a print run, printing run, printing, impression, or press run . This is all of the copies produced by a single set - up of the production equipment . One edition can have any number of print runs (i.e., first edition, first impression; first edition, second impression; second edition, first impression, etc .). Poor - selling books may have only one . Very successful books may have 50 or more . Older books (before about 1970) often noted the impression number among the publishing details . However, in printmaking each individual copy of a print is described as an impression . </P> <P> A publisher hopes to recoup a large amount of the book's initial costs from the sale of the book's first print run . A variety of commercial and logistic factors are thus considered in deciding the number of books in a print run, and their unit price . </P>

What does second impression mean in a book