Top-selling books sales growth in the U.S. 2017-2018
The enormous gap between the top-tier books and the rest has partially been attributed to the unusual success of political books, however another contributing factor is the ways in which books are treated by publishers. As many authors turn to the internet to promote their work, some publishers take note of current successes and tend to focus their efforts on maintaining that success rather than devoting time to draw attention to other titles.
A career as a book author is among those professions which are notoriously difficult to sustain, and a study held in 2018 showed that 57 percent of surveyed U.S. authors had to pursue other writing-related activities in addition to their book writing work.