I know you can do this with the Nook app, I have never used the Kindle app so I don't know about that one.

But I can't seem to figure out how to do it with the Google Play Books app, and I really like how it handles things now.

I assume I just have to move the files into the right folder but I can't seem to find it on my device and google search has been no help.

Any assistance is appreciated!