Unrestricted Fighting, No Martial Ethics

Boxing, Kickboxing, Wrestling, Mixed Martial Arts Novels

As long as it's a fighting novel, it doesn't matter if it has a system or not, it's passionate and punchy!

There Are Three Heads and Six Arms, Martial Arts, and Physical Training, but Not the Holy Mother

Are There Any Novels About Boxing, Black Boxing, Boxing, Fighting, Etc.

Preferably urban or something like that

Modern Fighting, Fighting Type