Digital publishing has gained momentum over the past few years. In fact, according to Statista, the total digital publishing revenue in the United States turned out to be nearly 18 billion U.S. dollars last year. If you look at the average revenue per user in the U.S., it approaches 79 U.S. dollars per capita. This average value is constantly increasing, which indicates that the industry is only headed towards greater expansion. It’s no wonder since digital publishing solutions are way cheaper than paperback publishing and allow readers to easily access an unlimited number of books via a smartphone, tablet, PC, etc. Owing to these and many other reasons, most readers have now started preferring eReaders over a paperback book. And this is not just limited to leisure reading. Digital publishing sure has made a mark in the field of educational publishing and eLearning.