There are currently two free audiobooks from Zondervan
available for download. Both are in mp3 format. The first, "Unlocked" by Karen Kingsbury, can be found at BooksOnBoard here
. The second, "Hostage in Havana" by Noel Hynd, can be found at GoBible here
Neither of these books are Christian-based (in the sense they are not about the Christian religion), but they are written somewhat from a Christian viewpoint so they have some elements of faith in their perspective.
Hope you enjoy!
Your audiobook bloodhound