All good advice so far. Audio books can also be downloaded. Bonus is the car is equipped with a usb input to the stereo.
One thing I will add. If you're not in a mad rush and you encounter things along the road that you would like to check out? By all means take the time to have a look around. Otherwise you will probably regret it later.
When I was driving from Waterloo ON, to Edmonton, AB I passed by a car museum in... either Minnesota or North Dakota, I can't remember which. It was $5 for the tour and I had to hurry along a bit but it was worth it to see the nice little collection they had. There were other things along the road that sounded interesting but I didn't have time for.