Edition (book) - Print Run

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. Poor-selling books may have only one. Very successful books may have 50 or more.

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.

Demand for additional print runs after the first is always hoped for, because they increase the book's overall profitability. Once the fixed costs of developing, editing, typesetting, etc., have been covered by the first sales revenue, any additional sales revenue tends to add to the profit margin (minus, of course, the costs of the additional materials, printing, binding, and distribution).

Sometimes a print run will be unsatisfactory for some reason, particularly with art and photography books where reproduction quality is paramount. It is usually destroyed by being pulped, but occasionally a defective print run may be shipped to a distant overseas market and sold there cheaply, depending on shipping costs.

If sales of the book do not meet expectations, the remaining stock of a print run will be remaindered. When a print run is sold out, the title is either reprinted or becomes out of print. Some print on demand and e-book publishers keep all their titles perpetually in print.

Seconds are imperfect or damaged copies which are set aside from a print run. These will usually have their dust jacket clipped or marked in some way.

From time to time, readers may observe an error in the text and report these to the publisher. The publisher typically keeps these reprint corrections in a file pending demand for a new print run of the edition, and before the new run is printed, they will be entered. This is one of the factors that puts the "substantially" into the definition of "substantially the same setting of type".