Apple currently has these 6 audiobooks available to download on iTunes:
Pride and Prejudice - narrated by Kate Beckinsale
The Time Machine - narrated by Kelsey Grammer
The Wonderful Wizard of Oz - narrated by Titus Burgess
Frankenstein - narrated by Aaron Mahnke
The Secret Garden - narrated by Karen Gillan
Winnie the Pooh (short story) - narrated by Disney Book Group

https://new.itunes.com/r?