How to instantly change your Flight Coach MP3 to an Audio Book
Right-click the logo or track and select 'Get Info', head to the 'Options' tab (see below) and then select 'Audiobook' from the 'media kind' drop-down menu. It may ask you 'Are you sure you want to edit information for multiple items?' Click 'Edit Items'. The file will instantly leave your Music library and head straight for your Audiobook library.