Regressing to Harry

Everyone has read Harry Potter by now, of course, and the franchise shows no signs (so far) of waning in popularity among all age groups. But why are adults so interested in these books aimed at children? Certainly, they are well-written and exciting, but what is it about today’s world that is making grown-ups more interested in reading about sorcerers and witchcraft than about love, sex, tragedy, and other more traditional ‘adult’ literary subjects?