ebook - Wikipedia The volume and value sales, although similar to 2013, had seen a 70% increase since 2012. Germany. The Wischenbart Report 2015 estimates the e-book market share to be 4.3%. Brazil. The Brazilian e-book market is only emerging. Brazilians are technology savvy, and that attitude is shared by the government. In 2013, around 2.5% of all trade titles sold were in digital format. …