It is pretty easy to “extend” the due date of the library ebook you check out to your kindle, just turn your wireless connection off until you’re done with it. This will allow you to keep reading the book until you’re done. The title won’t expire until you reactivate your wireless connection.
Ms Newman notes that the “buy this book” note from Amazon that arrives three days before the book is due is a useful reminder to shut off your connection until you’ve read the book.
This is more practical for readers using the Kindle reader, or using the Kindle app on an iPad or iPhone to read a library book, of course, but still awfully useful.