Unprotected PDF material
An example of how to download a DRM-protected book to your own device:
Bluefire Reader is a reader application for example for reading e-books.
It is available for iOS, Android and Windows devices.
Bluefire Readerin kotisivut
E-books can be read with computers, different kinds of mobile devices and dedicated e-book reader devices.
There are many reader device manufacturers. Here are a few examples: