The phrase "average paperback" refers to a typical or ordinary paperback book. It means a book made of paper with a soft cover that is of regular quality, size, or content. Full definition
As a good example of spotting anomalies and opportunities, Gallagher pulled up a list of the top 12 publishers of commercial romance paperbacks by point - of - sale data showing average paperback prices and sales volume. (publishingperspectives.com)
The Kindle, which is larger than the average paperback book but not as thick, won't wow anyone with eye - catching good looks. (macworld.com)
The screen is the size of an average paperback it seems. (goodereader.com)