The point of a book like this is that some who knows what you don't know from being asked questions about things he didn't know by people who did know, he now knows what you don't know and can tell you what you need to know.
The only knowledge you have now is of known unknowns without knowing anything at all about the unknowns unknowns.
I realize you are joking, but this is why I was in frantic mode in my early years. I do not have a degree in CS, so I had no idea what I was missing. Consequently I read up on everything. I still have a bookshelf filled with books on algorithms, "gotchas", Gang of Four wisdom, database design, you name it. I was forced to learn coding on the side and still have the habit today. I always have a side project going (which has fueled my career, but has also unfortunately cost me my marriage).
I now have a son going through the proper steps of receiving a degree, and I have book to supplement him for every class (except for the higher math).
The point of a book like this is that some who knows what you don't know from being asked questions about things he didn't know by people who did know, he now knows what you don't know and can tell you what you need to know.
The only knowledge you have now is of known unknowns without knowing anything at all about the unknowns unknowns.
Know what I mean?