I recently gave a neighbor my extra copy of One Second After. I knew she and I were on the same page...hey now, that's cleaver, don't ya think?
Recently I read Bobby Akart's Thirty Six Hours and Zero Hour. I have not found the thirty book in that series on sale yet, but will search for it. The Black out is due to a solar flare. One interesting part of the series, is that this upper middle class family, "get's it", the day before and have to really scramble. The antagonist makes some mistakes, and I found myself talking to her. "You should have gotten those to go with that". You know... we are practiced. I remind myself of my father, who was a Marine sharp shooter in W.W.2. We had to threaten to turn off westerns and and movie involving guns. We could not hear the dialogue, with his yelling things like "you don't have that many shots in that pistol", or "You could not make that shot from there". Sure miss that man.
Another really good read, involving survival during wartime, is The Nightingale, by Kristin Hannah. This is an excellent read. I read it years ago, in a woman's neighborhood book club. Everyone loved it. Thor though it was an excellent read as well.