Four years in, borrowing an e-book from your local library is still a difficult and confusing process that varies wildly depending on what kind of e-reader or device you own. And once you finally figure out how to borrow a book, there are other frustrations. Often, the e-book you want is unavailable, either because it’s been checked out by another patron, it’s not in your library’s system, or it’s not available for your device.