[Bfraser]

Originally Posted by Nate the great

I know that you've switched from talking about Dropbox to a focus on calibre, but I wanted to answer the original question fully just in case anyone else asks.

When it comes to connecting Dropbox to your Kindle account ...

There's IFTTT:
http://the-digital-reader.com/2015/0...o-your-kindle/

And Wappwolf might also work:
http://the-digital-reader.com/2015/0...drive-dropbox/

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Just tried Wappwolf. It did not send my textbook to Kindle.