The plot could be centered around the conflict between the forces of the evil god and the normal world. Maybe the light novel shows how the everyday life is disrupted by the presence or actions of the evil god. It could also explore themes like good vs evil in a more nuanced way, not just black and white but with shades of gray.
One similar light novel could be 'Demon King's Average Life'. It also has a non - typical protagonist, like in 'evil god average light novel', and deals with the idea of a powerful being in an everyday - ish setting. Another one might be 'The Dark God's Ordinary Adventure' which has a similar concept of a dark or evil - ish entity in a story that's not just about pure destruction but also about the character's growth and interaction with the world.
I'm not sure about its popularity. It might be popular among certain groups of light novel fans who are into the genre of stories involving evil gods. Some might be attracted to its unique concept and the potential for dark and interesting storylines.
Survival is also a key theme. The presence of an evil god usually creates a dangerous world for the characters. In 'Grimgar of Fantasy and Ash', the characters are constantly fighting for survival in a world that seems to be controlled by some unknown and possibly malevolent force. Additionally, redemption can be a theme. Some characters might try to redeem themselves from the influence of the evil god or oppose the evil god to seek redemption for the world, like in certain plotlines where heroes rise up against the tyranny of an evil deity.
"Black-bellied Evil God Get Lost,""I'm Really Not The Old One's Ruler,""Evil God City,""Evil God Judge,""Heavenly Dragon Evil God," and "Picking Up An Evil God As A Daughter" are light novels with the male protagonist being an Evil God Envoy. You can choose any one of them to read according to your preferences. I hope you like this fairy's recommendation. Muah ~😗
" Defiant Evil God " was an anime adapted from the online novel of the same name written by Mars Gravity. It described the legendary experience of the main character Yun Che, who, after many reincarnations, took control of the Heavenly Poison Bead and continued to grow in adversity, eventually becoming an evil god. The animation was well made, with excellent visual and sound effects. At the same time, it also showed deep emotions and character creation.
The concept of an evil god makes it stand out. It's not often that we see stories centered around an entity that is purely evil in the context of a light novel.
One popular 'evil god' light novel could be 'Overlord'. In this novel, the main character has a rather 'evil' presence in the new world he finds himself in. He rules with an iron fist in a sense, and there are many elements related to power, strategy, and a different kind of morality. Another one might be 'Re:Zero − Starting Life in Another World'. The Witch of Envy can be considered an 'evil god' - like figure in the story, and the complex plot that revolves around her influence makes it an interesting read.
Typically, the average length of a light novel can range from about 50,000 to 150,000 words. However, this can vary quite a bit depending on the publisher, the series, and the author's style.