It looks like the developer plans to add access to a range of commercial ebook stores so you can purchase from within the app but right now none is set up. (activitypress.com)
Just as publishers need to obtain permission from their authors and artists to distribute their works electronically, publishers need a separate license to embed fonts into commercial eBooks. (fonts.com)
If it delivers good technology, and a substantial catalogue of commercial ebooks, it could change the landscape for booksellers. (activitypress.com)