A few weeks ago I bought a book in the iBookstore. The title of this book is "Der Aurora Effekt" (German). Then a few weeks later I bought the book "The Tributes of Panem" (German version).
The first title I can copy to my Kobo eBook reader and read the book. But "The Tributes of Panem" was not readable!
Is it possible that not all books are DRM protected?