It depends on where the file is located. If it's in the Kindle app folder, then you won't have access to it - but if it's stored somewhere outside of that you might. Here's a link to some info on the Kindle file format -> https://en.wikipedia.org/wiki/Kindle_File_Format
I was hoping to be able to send an intent to open the Kindle app at a specific book. I can load the Kindle app but not a particular book. I don't know what to send to point the Kindle app to the required book.