Read more: 12 Smart Gadgets You Didn't Know Existed Kindle Unlimited is Amazon's main paid e-book service. For $11.99 a month, you can access Amazon's library of digital books, audiobooks ...

Better yet, you don't need to install anything extra to use Audible with your Kindle — you just need to find the audiobook in your Library and download it. Then, you'll have access to your ...