Audiobooks are a great resource for improving listening skills and there are literally hundreds of free audiobooks available. I was going to review some of the apps for downloading and listening to audiobooks but AppAdvice.com has already done such a good job that I'm not going to bother. Click here to see their excellent audiobook app review. You should also download their free AppStart for iPad app ("the ultimate iPad starter guide").
• Audiobooks (iPad Edition) Review (Macworld App Guide)