You seem to be under that impression that those who might spend their time reading Harry Potter books don't have the sophistication to enjoy other forms of literature.
You obviously couldn't be more wrong.
Have you seen the PBS-Mystery videos of some of the Hillerman books? They’re very well done (except for “Skinwalkers,” where they messed with the plot way too much), and have great casting.
Wes Studi as Joe Leaphorn! (Speaking of actors one can watch (and listen to) forever ...