Kindles don't really support epub. If you copy an epub into your Kindle it cannot read it. If you use the "send to Kindle" app, it sends the epub to Amazon, whi

Kindles don't really support epub. If you copy an epub into your Kindle it cannot read it. If you use the "send to Kindle" app, it sends the epub to Amazon, which converts it to their proprietary format and ships it down to your Kindle.