Could you give a little more insight into what is in the book. From a glance it is about mining and refining, and geology. Maybe a few years after an event that would be useful, but it probably wouldn't be the first thing i'd care about.
It is useful because it allows you to start mining and refining metal without access to any sort of modern technology.
You would only need access to wood, fire, and rope to start the process of making metal tools.
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