I have an iPhone 3GS. The iBooks app on it allows me to read e-books in the open EPUB format. In earlier posts such as Turning DRM'ed PDB eBooks into iBooks, iBooks♥B&N: Let's Get Ignoble!, iPhone: Reading Adobe/EPUB eBooks, and Breaking Adobe DRM — Tips, Tricks, Workarounds I talked about how to remove the Digital Rights Management encryption for various types of e-Books (those in the eReader PDB format; those in the Adobe-encrypted EPUB format used by Barnes & Noble; those in the Adobe-encrypted EPUB format used by Adobe Reader software) so that they can be read on an iPhone or an iPad.
Now I've discovered how to do the same for e-books from the Amazon Kindle Store.
Click on this image ...
... to read how I did it for Kindle books I'd purchased somewhat earlier for use in the Kindle app on the iPhone. They still work in that app, of course, but I want all my e-books in iBooks so I don't have to keep track of which e-books are where!
The same basic procedure should work in the future if I buy more Kindle e-books.
The procedure is geared toward Mac users. The Skindle app that decrypts the e-books runs on Windows, meaning that I have to run Windows in Parallels Desktop for the Mac, available here. As far as I know, there is no equivalent on the Mac platform to Skindle for Windows.
If you have a Windows platform, the basic procedure still works — with fewer complications! You will need Skindle (available here) and calibre (available here), to go with Amazon Kindle for PC (K4PC), available here. When you follow the procedure linked to by the image above, some of the steps which are intended to bridge between the Windows/Parallels and Mac environments drop out. Instead of running calibre in the Mac environment, you will run it in Windows. Ditto, iTunes.
Be aware that Skindle Version 06 works with K4PC Version 1.2.0 (30413) and possibly with some earlier K4PC versions. Amazon has in the past modified its DRM for new versions of K4PC such that decrypters like Skindle no longer work ... until their authors revise them for the new K4PC version!