Our apologies to SYNC Listeners who have saved their SYNC titles in the OverDrive App on their Apple device.
The iOS7 update does indeed clear your OverDrive App library of titles. Because of the temporary nature of the SYNC titles (generously given to us for just one week by the audiobook publishers) the OverDrive suggestions for title restoration will not work for SYNC titles. There is sadly no way for us to restore those titles for you. The update compatibility was unanticipated and out of our hands.
Again, our apologies!