How can I get my audio books back into iTunes?

Dennis goes overseas a lot and listens to both audio books and podcasts. He has an audio library now of several hundred books. But recently he's been unable to transfer purchases from his iTunes account. It requires him to erase his iPod to transfer them. Leo says that's copy protection nonsense. One thing Dennis can do is download them again from Audible.

If he has them on his iPod, he can get them onto his computer using a third party program called Senuti. There's also Ephpod. Then he can import them into iTunes.

In iTunes, Go into File>Devices, then select the "Transfer Purchases" option. If it doens't appear, then his iPod isn't linked to iTunes.