Books by women cost 45% less than those by men, according to a study of 2 million books. ?? So why are books by women cheaper? ? The researchers point out that women often write in genres that sell for less. Romance rather than science, for example. But even when these differences are accounted for, books by women still cost 9% less than those by men. This has led to speculation that publishers are sexist or presume that books by men have universal appeal, while books by women do not. Self-published and self-priced books see the same gender price gap. Are books by women under-valued? Source: World economic forum: book club