You can purchase and read Kindle books on a Mac. E-books purchased on Amazon automatically show up in your Kindle app on a Mac.
The Kindle Cloud Reader is a browser-based ebook reader you can use on a computer to access your Kindle library.
All you need is Amazon’s Kindle app and a few taps to start reading; no extra device required This article explains how to download and read Kindle books on an iPad ...
Amazon’s latest Kindle update stops you removing DRM from newly downloaded e-books, making them impossible to back up.