My 16 year old DS does read which is something but is incredibly lazy. He constantly rereads Charlie Higson, Robert Muchamore, Hunger Games etc. I would never have believed when he was at first school and totally enthused by Alex Rider that he would still be rereading his adventures now!
There's nothing wrong with rereading old favourites or enjoying an easy read but I would like to see him challenged and stretched too.
I've been trying to get him to read adult fiction and have had success with contemporary fiction if it is bleak enough e.g. The Wasp Factory and The Cement Garden went down well. Anything that is remotely challenging doesn't work - he won't read Irvine Welsh due to the Scottish dialogue and rules out a lot of American lit I think just because it tends to be slightly different stylistically. He thought The Catcher in the Rye was rubbish.