BTW you get the Kindle for free if you buy the paperback -- it's a special thing Amazon does called "MatchBook." It's pretty sweet because you can read the Kindle yourself, then give the paperback as a gift. Not that I've done that, or anything ;)
You can also read the Kindle for free if you have the Amazon "Kindle Unlimited" subscription.
(Please note, you don't need a Kindle device to read it on Kindle. You can get the Kindle app for your phone / computer / tablet, wherever you like to read.)
Check out a free preview here: