Really, I'm not arguing that EMP would not wipe out some devices and (effectively) some data. But the sheer proliferation of data and devices around the world, with millions and millions of personal copies of ebooks ... it's not credible to worry that Stephen King's work will disappear in the event of such an attack. The probability that everything gets fried globally is well past remote.
And, as noted, in such an event we'd have other things to worry about.
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