I'm trying to transfer books [PDF/epub files, NOT purchased via store] between my MacBook and iPhone using the iCloud. I THINK I've managed to upload them successfully from the MacBook [although how I tell I'm not sure!] but my iPhone can't see them at all. I'm sure I'm missing something obvious, but I've gone forward and back through the settings and frankly this is starting to wind me up. If anyone has an idea I'd be very grateful.