We are a family that love books, but need some ideas for unusual audio books - maybe mystery or drama - that are interesting enough for both a 15 yr old boy and also us parents.

Something off the beaten track would be good... Not things like the hunger games or similar, as we have read most current stuff... But maybe things we might have missed that have a good story. Even if they are quite old that's cool.
Long is also awesome.. We have a LOT of time to kill!

All ideas greatly received.