The share of books sold as e-books declined between the first and second quarters of 2013, part of a general flattening trend for e-book sales described by a new report from the Book Industry Study Group, as reported by Publisher’s Weekly.  E-books account for about 30% of units and 14% of dollars in the book business, according to the report. 

Amazon has a dominant share, with around 67% of e-book sales (51% from the Website and 16% using an app).  Barnes & Noble has a 12% share, and Apple’s iBooks store has an 8% share.   

One interesting trend reported by the BISG is that there’s an increase in the people that buy print and digital versions of a book interchangeably, and a decline in the number of people that exclusively buy e-books.