I have a massive problem with books that fail to deliver on their title. In my opinion, the title of this book is the equivalent of clickbait headline.

Let's be very clear -- what happened at the embassy was not an overthrow attempt. It was a failed attempt to rescue a diplomat that involved staging a kidnapping to protect the family members of some of the diplomatic staff in Madrid. That's it.

That is not a "Secret Mission to Overthrow the North Korean Regime" any more than operations by groups that send USB drives over the North Korean border via balloons, smugglers who bring in copies of banned media, or the black markets that have been popping up throughout the country selling goods outside of the eye of the regime -- all of which, in my opinion, have a greater impact on challenging Juche and chipping away at the power of the regime.

This book makes the argument that if you can prove the infallibility of the North Korean regime, then that is a way of overthrowing the regime, because it highlights that they are capable of making mistakes (Juche ideology states that the Kims' are incapable of making mistakes).

While this book reads fine and gives a good overview of the people involved and the Cheollima Civil Defense, but in my opinion, you can get just as much information reading the Wikipedia page about the incident.