For anyone trying to figure out how to transfer Ken's files to their e-reader, I have just one word for you: CALIBRE
Calibre is free e-book management software. You install it on your computer and, when you run it, you can import files into Calibre for transmission to your e-reader. If the file is already in the right format, no further action needed. If it's not, Calibre can convert most formats to the correct one - for example, if you had a file in MOBI format, it could convert to EPUB for you if that's what you needed.
Connect your e-reader to your computer via the cable. Calibre will recognise that your e-reader is connected, and you'll see an option to send selected items to your device. In a second or two, your file(s) will be on your device.
Calibre also allows you to manage files that are already on your device - delete, change title etc. I love it.
Wendy
