One similar light novel could be 'Sword Art Online'. It also has a complex fictional world and engaging characters. The story is set in a virtual world where the characters face various challenges.
Since I don't have a full knowledge of 'mismarca koukoku monogatari light novel', it could potentially be about the history, culture, and the daily lives of the people in the Mismarca setting. It may also revolve around a hero's journey to overcome challenges, whether they are physical battles or internal struggles. Maybe there are magic or special abilities involved too.
Light novels often have unique settings and engaging storylines. For 'koukoku no shugosha light novel', it could potentially be set in a post - apocalyptic world where the main character, the shugosha, has to face various challenges such as fighting against powerful enemies, surviving in a harsh environment, and uncovering the secrets of the world. The story might also explore themes of hope, sacrifice, and the power of the human spirit.
Another option could be to look for specialized anime or manga stores. They sometimes also carry light novels. You can also check second - hand bookstores, which might have a copy at a more affordable price.
Monogatari started as a light novel. The success of the light novels led to manga adaptations and other media expansions. But its roots are in the light novel format.