Scott I can hardly believe that there are books this big.
Well, the website is clear that the books you ordered are between 550 and 590 pages long, each. If you open them, you'll see that they went for a fairly large font size.
Scott Anyone who has difficulty reading longer texts will be totally overwhelmed.
If you skim the contents, you will notice that not all chapters are relevant to all readers. For instance, I'll make the guess that the chapter on becoming a nomad will hardly be applicable to most people. In regards to observing the lengths the author goes to in order to act on his threat model, it's an interesting read for sure. But the books don't make an insistence that readers have to read all of their contents.