First time owner of an iPad here - iPad Mini 3. Longtime user of Mac computers. I bought an iPad exclusively to do reading/highlighting. I have several EPUB files on my rMBP (Yosemite OS X 10.10.2). How can I sync these EPUB files to my iPad using iCloud? These eBooks were not purchased through iBooks. I do not want to plug-in a USB cable every time I want highlighting marks synced between the 2 devices. Is this possible? Thanks in advance.