I'm the app's developer, so I'll chime in here. The deals we have with publishers require that the book can't be returned to a bookstore. Having to write in you

I'm the app's developer, so I'll chime in here. The deals we have with publishers require that the book can't be returned to a bookstore. Having to write in your book isn't the only option though -- we do allow users to make their books with a bookplate sticker or stamp it with an ex-libris stamp: http://blog.shelfie.com/2015/01/01/take-shelfie-use-ex-libris-bookplate-to-claim-the-bundled-ebook/ http://blog.shelfie.com/2015/01/01/take-shelfie-use-ex-libri... The slip of paper trick (or acetate sheet) is an option for people who want to try to game the system... but we do have mTurks who check the claims and will block the accounts of repeat offenders. That said, there are easier ways to get free ebooks e.g. thepriatebay.se