One would have hoped that Book 2 would have gone deeper into camera design/manufacturing theory so a well grounded understanding of camera functions could have been gleaned, and the aspiring technician (tinkerer) made able to diagnose any camera. No such luck. Instead Book 2 is an expansion of Book 1. Even still in the same three section format. Imagine Book 2 as a stack of updated insert pages that would have been stuck into Book 1 had it been loose leaf.
I’m not saying Book 2 is bad, just that it doesn’t build on Book 1. It only expands it, like a Russian novel, more pages …. Not much new to learn, just more examples. Still the expanded list of cameras makes for a good reference. I would have been happy if both books were condensed into one at the price of a little more than either.