Every literate American needs to read "One Second After."
It has become very non-PC to suggest that anything at all can happen that won’t be announced in advance by government or cannot be fixed by government.
Now, I think the extent of the damage inflicted by an EMP attack may be overblown in the book. But I also think that a much-reduced version of that damage could roll this country in just a week into the a horror show not seen since the Civil War. Civilization is a veneer that is only so thick and we *are* vulnerable as a result of our over-reliance on electronics.
There are very, very few Americans who do any amount of prepping, let alone the amount necessary to deal with the worst case scenario.