OS X Kindle App: Where are the books located? I was expecting to find .epub or .prc files on my hard-disk, but didn't. Does anyone know: Where are the ebooks that the official Kindle App downloads located?
These files are now (October 2012) stored in:

~/Library/Containers/com.amazon.Kindle/Data/Library/Application Support/Kindle/My Kindle Content/


If they move again you can find them by running the command:

find  . -name *.azw