When you purchase a new Kindle book, it’s automatically delivered to your default device. You can send e-books you’ve purchased to any or all of your devices, but only your default device will receive it automatically. While you may simply be able to view your Kindle Cloud on your device and download the book for reading there, you may not want to go through that process each time you get a new book if you know for certain where you’re going to end up reading it. For some, books get read on iPhone or iPad, since it’s a device that’s often or always with you. Regardless of whether you want your iPhone, iPad, or Kindle device to be your default, here’s how to change where new Kindle books are sent.