I'm not familiar with the 'makai kaeri no rettou nouryokusha light novel'. However, light novels typically blend elements such as fantasy, adventure, and sometimes romance. It might be about a hero's journey in a mysterious world, or it could center around a group of characters with special powers trying to achieve a certain goal in a unique setting. Without reading it, it's hard to say for sure.
You can try looking for it in local bookstores that specialize in Japanese literature or light novels. They might have it in stock or be able to order it for you.
Well, one good thing could be its unique magic system. In many light novels, the magic system is what sets them apart, and this one might have an interesting take on how magic works in the world it creates.
Cash register cartoons usually have cute or humorous characters interacting with the register. They might have expressions that make the scene fun. Also, the background could be detailed to add to the story.
Well, 'comic grrl' usually showcases female-centric stories. The art might have a modern or edgy look. Themes could include empowerment, friendship, and self-discovery.