Was there an infinite genre of novels that involved fighting bosses in a normal world, unlike movies, novels, arcade games, comics, and other types?

Transdimensional Bookstore. The main character of this novel was a small boss who inherited his family's bookstore. He discovered that he had the ability to travel between novels, comics, movies, and even games. From then on, he could go to various worlds to defeat the boss. It could be said to be an infinite novel about fighting bosses in an ordinary world. I hope you like this fairy's recommendation. Muah ~😗