You've been re-directed to this page from my review of Epic! book app due to the fact that Share it! Science blog is no longer an business affiliate of their program. Rather than continue to feature reviews full of broken links, you can find more information about Epic! by following this link directly to their webpage.
I continue to highly recommend Epic! the "Netflix of children's books" to you as an excellent reading app with access to over 20,000 books! Also, remember that teachers and librarians can access this service for free. Many of my colleagues use it with their students and love it!