How do I play audiobooks I bought on Itunes on a Samsung Galaxy S3?

I have had an Iphone for the last 5 years. I recently was offered a free upgrade to a Samsung Galaxy S3. I took it and I love it. But I can't seem to get any of my audiobooks I purchased through Itunes to play/or even be recognized by my device. Is there something preventing me from using the files I paid for? If so, how can I listen to my own property?