There are a number of ways to get Leanpub books onto Kindle!
Using the Send to Kindle Link for a Book in Your Leanpub Library
In many cases you can simply use Leanpub's own Send to Kindle feature.
You can find instructions for setting this up on your Kindle Settings page.
Once you have followed the instructions, when you select a book in your Leanpub library, you may see the Send to Kindle link, like this:
Note that this feature only works if the Leanpub book has a MOBI version, and if the MOBI file isn't too big (i.e. over 49 MB). That being said, most Leanpub books have a MOBI version, and aren't too big!
To read a Leanpub book that is over 49 MB on Kindle, you need to download the MOBI file manually from your Leanpub library onto your computer. You can then use Amazon's Send to Kindle App.
To learn how to get a file larger than 50 MB into the Kindle app on your iPhone or iPad, please read this blog post.
[On a side note: here are some instructions for adding PDF files to Kindle: https://www.pcworld.com/article/2044412/convert-a-pdf-for-kindle-viewing-no-software-required.html]
Open the Purchase Email from Leanpub on Your Device and Click the .MOBI File Download Link
The easiest way to get a Leanpub book available in the .mobi format onto any device is to open the receipt email for your purchase on your device, and then just click on the link for the .MOBI version of the book in the email. This will download the .MOBI to your device, and if all works well, it will open automatically in the Kindle app.
You can also do this by clicking on the link for the .mobi version if you sign in to Leanpub on your device and select the book in your Leanpub library.
Amazon's Send to Kindle App
After you download the .MOBI file for the ebook from your Leanpub library, you can use Amazon's Send to Kindle app to send the .MOBI file to Kindle.
Adding a Book to Kindle via USB
If you download the .mobi file to your computer, you can then connect your Kindle (or another device, like an Android device with the Kindle app) to your computer via USB, and then manually copy or drag the .mobi file for the book from your computer onto your device.
Verify your Kindle document
If you try to send an ebook from Leanpub to Kindle, you may get an email with the subject "Verify your Kindle document". Here is a link to another article in our Help Center about that.
If you're still having trouble
If none of these methods work for you, the best thing to do is look for support on Amazon.
Here is a link to their support forum:
OK, that's it!
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Interested in creating your first Leanpub book? Here are some quick tutorials for our most popular writing modes: http://help.leanpub.com/en/articles/3088382-quick-walkthroughs-for-getting-started-on-a-leanpub-book