+1 for Audio books.

Download for free from the library - i like mostly non-fiction, so I got an education along the way.

+1 for audio books as well.. sometimes i just had it with all the music.. for boring stretches they are perfect!

I'm an audiobooks fan as well but you do need to think about what you want to listen to. I did about 3k km through various Euro countries in Oct listening to Donna Tartt's The Goldfinch and I started to lose the will to live. It's not that it's a bad book but it's so long (about 32hrs for the unabridged version iirc) - I'm still only half way through it.

A selection of shorter stuff, plays etc that last about as long as a tank of fuel is better, or at least gives you a break from the motorway like never endingness of a long book.