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Another more recent novel about nuclear war is "The 2020 Commission Report on the North Korean Nuclear Attacks Against the U.S.". It describes the Trump administration handling a North Korean crisis poorly, as you'd expect.

One thing I found interesting: the book states that much of DPRK C3 is done over encrypted channels that use civilian cell phone network towers, because they can't afford to maintain a completely separate military communications network like many other nuclear states.

During the crisis, South Korea fires a missile at the Kim family home when Kim Jong Un was known to be observing a missile test elsewhere. But this results in rumors that Kim Jong Un had been killed, resulting in a spike in civilian cell phone traffic and a collapse in service. With communications down, missiles striking official residences, and a South Korea/US wargame happening next door, Kim concludes that a decapitation attack is in progress and goes nuclear.

Fun fact: for several decades the US has had a telephone priority system for government officials. If the book is at all correct, if would be in the US's interests for the DPRK to implement one: https://en.wikipedia.org/wiki/Government_Emergency_Telecommu...