The vast majority of books I noticed at my local bookshop were dedicated to different openings or certain subcategories of those openings. Batsford, I think, is the most famous publisher of these.
Again I'm bad at chess but that sounds like mostly a waste of time until you're already very good from what i understand. That stuff might be entertaining to learn but if you're rated like 1500 I doubt you're losing cause your oponents are getting out of the opening with a 1/4 pawn advantage. And it takes a lot of study to get to the point where you worry about that (imo)