A book series with compelling characters, an interesting world, and "things that happen" is perfect for driving. I don't mind a 10 hour day of driving with a good book or even my regular 2000 mile drives with a good series. I figure the $2/hour for content is just part of the cost of driving.

I had the same feeling with that same series. I used to look forward to my 30 minute commute to/from work. I'd save the book for the commute and it would always be something to look forward to. Have you found any other books similar to that?