Hello, I have no access to my iMac at the moment so I am using a PC windows 8.1. Installed iTunes on the PC and downloaded 2 audiobooks but when I try and drag the books to my iPhone 5 (attached to the PC via USB) I get a red circle and the books just sit in the library. iTunes sees my previous audiobooks on the iPhone. Note: iTunes does not display the phone number just the serial number. Could someone shine some light on this? Thank you.