What is Reddit's opinion of Dark Territory: The Secret History of Cyber War?

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This book goes into detail https://www.amazon.com/Dark-Territory-Secret-History-Cyber/dp/1476763267

No there hasn’t been any confirmed cyber attacks that have had the same effects the bombings in japan. The primary reason for this is simply because offensive and defensive cyber capabilities are known only by those with the highest security clearance and need to know. Additionally the fact that cyber attacks are 100% deniable leaving the recipient of an attack with no publicly releasable information to justify anything other than a retaliatory cyber attack. If someone launches a nuclear attack and cripples your entire power grid, you have someone to blame and plenty of evidence to confirm it . If someone attacks your power grid with a cyber attack and reaps the same effect, you you can scream and cry all you want but you have minimal means to prove who the attacker was. A prime example are the attacks on Iranian nuclear centrifuges setting back their nuclear R&D . A cyber attack caused explosions and failure. Although they would like to blame the US and Israel there has been no evidence that supports that claim.

Turns out it raised the right questions in the minds of the right people:

https://melmagazine.com/en-us/story/wargames-ronald-reagan-cybersecurity

“Could something like this really happen?” 

This was the question posed by President Ronald Reagan on June 8, 1983, to a room full of cabinet members and congressmen in the White House. As author Fred Kaplan explains in his book <em>Dark Territory: The Secret History of Cyber War</em>, Reagan had recently viewed the movie WarGames and “he couldn’t get that movie out of his mind. At one point, he put down his index cards and asked if anyone had seen it. Nobody had… so he launched into a detailed summary of its plot.”

As Reagan recounted the film, the room full of defense experts sat uncomfortably, suppressing smirks, as the leader of the free world described to them the plot of a Matthew Broderick movie about a teenager who hacks into NORAD, thinking it’s a computer game, nearly kicking off World War III. At the conclusion of his synopsis, Reagan turned to General John Vessey, Chairman of the Joint Chiefs, and asked if such a thing were possible. Unsure, Vessey promised to look into it.

A week later, when Vessey returned, Reagan got his answer. Vessey said, “Mr. President, the problem is much worse than you think.”