I was looking through PA fiction recommendations when someone provided a link to this free eBook download of a book called Lights Out. While I am not finished with it, it is definitely entertaining (especially for free).
The story takes place after Muslim terrorists decide to explode nuclear devices above our atmosphere, using the nukes more for their ability to wipe out the electronic gridwork than the destructive force of the bombs. Not only do the nukes take out all the power grids, cars, etc, but the ability to put everything back in working order is going to take much longer than the government wants to let on. Time passes and people become more and more desperate. One small community decides to stick together, fortify their neighborhood, and stick it out as best they can. While the writing is often cliche-laden, it is fun enough for free. Check it out here:
www.giltweasel.com/stuff/LightsOut-Current.pdf