There are two options for digital purchases. Choose the Digital Pack if you are downloading to a computer and want versatility of file types. Choose the Kindle version* if you are downloading directly to a Kindle or a mobile phone with a Kindle app.
*Disclaimer/note on Kindle version: If you buy a Kindle book from someone other than Amazon, it will appear slightly differently in your Kindle library. The book will look and read perfectly, but it will show up in the Library under “Docs” instead of “Books” and will appear without a cover thumbnail. This is the small price of rebellion. If you prefer to give a hefty cut to the overlords and get a “normal” Kindle book, you can do so right here.