If it really is GA yes look into rules and regs, but a handy tip is to really point blank ask them what is in the interview beforehand.
If they have a HR person involved it will be a whole different ball game.
If its you and the chief pilot it could all be all about what sport you follow.
If HR is involved there is so much to research that it is no longer a matter of looking into just the aviation side.
I would say that learning up about the HR side is far more important these days unfortunately. -What the double meaning of the standard questions are, prepping your 'stories' for "tell us a time when..." . Also general job interview etiquette.
I found those books you show are pretty hopeless to give the core of what you need, because they focus on the aviation part, something that was more predominant in the 80s. Ace the technical interview 1st edition is known for lots of errors. Haven't heard about the 2nd edition.
Handy tip don't even discuss the airline concerned in the interview waiting room with the other pilots, as happened to me the interviewers were listening down the hall and thought I was slagging the airline off. I wasn't!