A universal solution for the present time has been found. I fixed my B&N problem from yesterday by just plain stripping the DRM from the file.
It turns out that B&N uses its own DRM format, and is not compatible with Adobe Digital Editions at all. Their Nook readers are compatible with ADE, and can read content from ADE compatible providers such as Kobo or many public library systems, but ADE cannot read B&N/Nook epub files. The B&N desktop reader application can read those files and display them, but makes no provision for loading them to a non-Nook epub reader. So... I paid for the book, and I converted it to a readable format for my own use. End of story, and probably the end of my dealings with B&N.
The Nook DRM uses a key built from the credit card account holder's name and the credit card number used to purchase the book. This means that if you later change credit card numbers, as nearly everyone will do eventually even if they stay with the same bank, the key for your books bought with each credit card number will be different. What a stupid concept. That alone is a good reason for stripping the DRM from these files if you want to retain access to them permanently.
This also explains why B&N can't accept PayPal or other electronic transfers for the purchase of Nook epub files. They need a unique credit card number in order to construct the DRM keys. And because the system is hardwired into the thousands (millions) of Nook devices that have been sold, changing the method is well-nigh impossible for them.
The book is now installed into my ereader and displays perfectly there, as it should.
It turns out that B&N uses its own DRM format, and is not compatible with Adobe Digital Editions at all. Their Nook readers are compatible with ADE, and can read content from ADE compatible providers such as Kobo or many public library systems, but ADE cannot read B&N/Nook epub files. The B&N desktop reader application can read those files and display them, but makes no provision for loading them to a non-Nook epub reader. So... I paid for the book, and I converted it to a readable format for my own use. End of story, and probably the end of my dealings with B&N.
The Nook DRM uses a key built from the credit card account holder's name and the credit card number used to purchase the book. This means that if you later change credit card numbers, as nearly everyone will do eventually even if they stay with the same bank, the key for your books bought with each credit card number will be different. What a stupid concept. That alone is a good reason for stripping the DRM from these files if you want to retain access to them permanently.
This also explains why B&N can't accept PayPal or other electronic transfers for the purchase of Nook epub files. They need a unique credit card number in order to construct the DRM keys. And because the system is hardwired into the thousands (millions) of Nook devices that have been sold, changing the method is well-nigh impossible for them.
The book is now installed into my ereader and displays perfectly there, as it should.