One popular title is 'So I'm a Spider, So What?'. In this novel, the protagonist is reincarnated as a spider in a dungeon and has to survive and grow in a harsh new world. Another is 'That Time I Got Reincarnated as a Slime'. The main character is reborn as a slime and gradually builds a powerful nation of monsters.
Well, 'Reincarnated as a Dragon Hatchling' is also quite well - known. It follows the story of a human who is reincarnated as a dragon hatchling and has to deal with the challenges of being a young dragon in a world full of magic and danger. There's also 'My Isekai Life: I Gained a Second Character Class and Became the Strongest Sage in the World' where the protagonist, after being reincarnated, has some unique experiences related to his new form and powers.
One popular one could be 'The Reincarnated Baby Mage'. Another might be 'Reincarnated as a Baby in a Fantasy World'.
There is also 'Monster Musume' which is about a world where monsters co - exist with humans and there are some interesting relationships and stories that unfold as a result of this co - existence. It has an element of harem as well, with the male protagonist being surrounded by various monster girls.
One popular 'Reincarnated as a Monster' light novel is 'Reincarnated as a Dragon's Egg - Let's Aim to Be the Strongest'. It follows the story of a protagonist who is reincarnated as a dragon egg and has to navigate a world full of challenges and grow stronger. Another one could be 'So I'm a Spider, So What?', where the main character is reincarnated as a spider in a dungeon. The story focuses on her survival and evolution in this new and dangerous form.
There's also 'I'm a Spider, So What?'. In this novel, the main character is reincarnated as a spider in a dungeon. She has to struggle to survive in this harsh new environment, using her wits and the skills she develops over time. It has an interesting take on the reincarnation concept as we see the world from the perspective of a spider.
The exploration of a new world is another typical theme. When reincarnated as a monster, the character is in a different world or at least a different part of their original world. They get to discover new magic systems, cultures of other monsters, and hidden secrets. For instance, in many of these novels, the protagonist discovers unique magic spells or abilities that are specific to the monster species they have been reincarnated into.
You might want to check out 'Reincarnated as a Behemoth'. Here, the MC's reincarnation as a monster leads to an exciting and action-packed journey filled with challenges and growth.
Another interesting plot could be the power struggles within the monster community. The reincarnated monster might find themselves in the middle of territorial disputes or battles for dominance. They have to use their wits and newfound powers to survive and thrive in this complex and often dangerous new world.
One popular 'farming light novel' could be 'Farming in Another World'.
The light novel 'Grimgar of Fantasy and Ash' can be included. The characters are in a harsh and unforgiving world, and there are numerous instances where their survival seems uncertain, similar to the concept of deathflags. Additionally, 'Konosuba: God's Blessing on this Wonderful World!' has comical yet dangerous situations for the characters that can be related to the idea of deathflags in a light - hearted way.
Well, there could be 'Dragonborn: Rise of the Legend'. It might tell the story of a dragonborn's journey to become a great hero, facing various challenges and making allies along the way. Maybe there are epic battles against powerful foes and the discovery of hidden powers. Another could be 'Dragonborn: Quest for the Lost Artifact' where the dragonborn embarks on a dangerous quest to find a very important and powerful artifact that could change the fate of their world.