Kindle and ePub Editions When you purchase the Digital Editions or the Print and Digital Bundle you will receive download links to three versions of the digital edition. If you own any version of the Amazon Kindle, you will need to download the .mobi version to your device. This is Amazon's proprietary format for ebooks. If you use any other kind of e-reader, including a smart phone or tablet, download the generic .epub version of the file. These digital editions are standard, reflowable ebooks, suitable for reading on a variety of devices. Fixed Layout ePub: Exclusive Bonus When you purchase a copy of Principles of Practical Natal Astrology from this site, you also receive an exclusive digital edition of the book, not availalable anywhere else. The fixed layout ePub gives you virtually the same experience reading the digital edition as you get reading the printed book. You will need a tablet (iOS or Android) to view the fixed layout ePub. On the iPad, transfer the file and open it in iBooks. If you're on an Android tablet, you'll need to download a free copy of the Kobo Reader app for the file to display correctly. It's possible to view it using Google Play Books, but not all of the type will display correctly.