For a consumer to use the Kindle Owners' Lending Library, he must own a Kindle, sign up for an Amazon Prime membership free trial or a paid membership, and select a qualifying e-book to borrow every month. Amazon Fire phones and tablets are also qualifying devices, as of May 2015.
The Amazon.com website gives specific borrowing instructions for each Kindle device. In general, a consumer browses e-books in the Kindle store and identifies eligible e-books by looking for a "Prime" designation with the book listing. Once he finds an eligible book he wants to borrow, he clicks on "Borrow." A screen results that gives him the option to buy the book or borrow it for free. After he chooses to borrow it, he can start reading the book as soon as it downloads.
A consumer who cancels Amazon Prime or whose membership expires after he borrows a book no longer has access to the borrowed book. Otherwise, he can keep the borrowed e-book as long as he likes. Once a new borrowing month arrives, he can return his book and check out a different one. If a consumer makes notes, highlights or bookmarks in a borrowed book, these actions are saved for future use if he purchases the e-book.