DRM (if any) is one difference. Circumventing copyright controls can open you up to civil and criminal penalties. Not all digital books are DRM protected. I re

DRM (if any) is one difference. Circumventing copyright controls can open you up to civil and criminal penalties. Not all digital books are DRM protected. I recently listened to Cory Doctorow’s audiobook The Bezzel and at the end he tells you that you have the right to loan or sell your copy of the audiobook.