True, but that DRM is relatively easy to handle, and is sort-of a standard (OK, I know Adobe handles it, but it's not a complete walled garden like Kindle). I can borrow an ebook from my library using my browser, download the DRM'ed file, fulfil it (using Adobe Digital Editions), copy to my ereader. I can buy books from Google and do the same. It's relatively straight forward to strip the DRM if you want to. Because it is reliant on a third-party service (Adobe) that has other clients/interests, it's not as likely to change as quickly or as onerously as Kindle's DRM.