I think there is another reason why young adult novels are doing well, and it is less easy gauge. As of yet, there are no real studies determining this, but anecdotally, we all relate to it. A book is an opportunity to get “off the grid.” We read to break free of their digital tether. To experience what life was like before the net. To disconnect. To finally feel alone.
From an article on "Why Teenagers Read Better than You."
h/t Marginal Revolution