Are you looking for a solution, or more information? _The information: a theory, a flood_ by James Gleick is good. I read it because I'm in that line of work, but I think it's a good summary of why content is produced and what the challenges are. You could also do something like _The shallows_ by Nicholas Carr, which is more of polemic than anything else, though I did enjoy it.

Perhaps _You are not a gadget_ by Jaron Lanier or _Hamlet's Blackberry_ by William Powers, but neither of those are books I could finish.

Finally, I read _Deep work_ not long ago and thought it was pretty good.