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I started off reading eBooks from the Amazon Kindle store. As time has progressed, I’ve found myself using my physical Kindle less and less. Partly because I forget to charge it, and partly because I can never get the lighting in my favorite reading locations quite right. And at night? Forget about it.
So I’ve converted all of my Kindle purchases to ePubs for use in iBooks. I could use the Kindle app for iOS but I’ve found iBooks to be faster at syncing read position, and it feels a lot more natural to use.
Since I went through the effort of converting all of my Kindle documents, I figured I’d write a mini guide to getting it done. I’m specifically focusing on the Mac since that’s all I know; other users will have to venture elsewhere.
Setting up Calibre
Calibre is a Java application which is an eBook management suite. It’s a bit ugly but it does what it says and works well. Since the Kindle’s eBooks are encrypted, we need to install a decryption plugin to do the heavy lifting there.
- Download and install Calibre.
- Download and decompress the DeDRM archive.
- Open Calibre’s preferences (
⌘,
). - Go to “Plugins”.
- Click “Load plugin from file”.
- Choose the K4MobileDeDRM plugin’s zip file (zip within the main zip; don’t extract).
The encryption used on Kindle books is fairly basic. The decryption key is a product of the serial number for your device, so it’s not difficult to determine.
Getting eBooks
The DeDRM scripts work by understanding Kindle for Mac’s settings files, so to get the eBooks we need use the application. There are scripts to do conversions directly from Kindle hardware’s eBooks, but it’s more effort.
- Download Kindle for Mac.
- Register it with your account.
- Download all of your eBooks (open them from the “Archived Items”).
Converting eBooks
Kindle eBooks are in the MobiPocket format. However, iBooks requires ePub, so we need to both decrypt and convert the files. At this point, we’ve got all we need, so we can use Calibre to do the conversion.
- Navigate to
~/Library/Application Support/Kindle/My Kindle Content/
- Drag all of the
.azw
files into the Calibre window. - Select the books in the Calibre window which you wish to export.
- Click the “Convert books” toolbar item.
- Choose “ePub” as the output format in the top-right of the convert window.
- Go to the “Page Setup” item in the left list, and configure the conversion as so:
- Select “Kindle” as the input profile.
- Select “iPad” as the output profile.
- Hit the “OK” button to begin the conversion. It may take a while.
If you have any issues at the decryption step, you should delete your~/Library/Application Support/Kindle
folder and start again.
Enjoy
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You can now “Save to disk” from the toolbar item to save the books which you’ve converted, and import them into iTunes for use in iBooks. Calibre is powerful enough to do many other formats if you want to use other devices as well.
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Remember, don’t post any of the unencrypted documents anywhere. Just because the DRM is gone doesn’t mean you’re legally authorized to do so. They’re for your personal use only.