Amazon is making some big changes to its Kindle books, and you only have a few days to prepare. Here's everything you need to know before it's too late.

If you're an avid e-book reader or someone who has an extensive library of Kindle content, now is the time to back up your books: Amazon is killing the option to save e-books to your computer.

Amazon is eliminating users' ability to download Kindle books without WiFi, meaning you’ll want to move your library as soon as possible.

Amazon will remove the 'Download & Transfer via USB' option from its website. Here's how to save your collection.

Amazon confirmed the removal of the book download feature in a statement to The Verge. “Customers can continue reading books previously downloaded on their Kindle device, and access new content through the Kindle app, Kindle for web, as well as directly through Kindle devices with WiFi capability,” said Amazon spokesperson Jackie Burke.

Amazon has confirmed the abolition of a function that made it possible to download their bought Kindle books to a computer and manually transferred to their Kindle devices via USB. This is now happening for security reasons.