Digital Book World has launched a weekly set of ebook bestseller lists that aggregates the previous full week’s sales ranking data from Amazon, Nook, Google, Kobo and Sony into an overall list of the top 25 selling books, as well as four additional top 10 lists organized by price tiers: free to $2.99, $3 to $7.99, $8 to $9.99, and $10 and up. The bestseller lists, which will appear every Monday, were developed for DBW by Iobyte Solutions and seek to address the lack of differentiation between inexpensive ebooks — either self-published or priced promotionally for a limited time — […]