A.T. Fomenko's book has faced a lot of criticism. It strays far from established historical methods and evidence, so it leans towards being fiction rather than reliable science.
There was a case where a patient with a specific mutation in lung cancer cells was given afatinib. Initially, the patient was in a rather poor condition with the cancer spreading. However, with afatinib, not only did the cancer stop spreading further, but the size of the existing tumor also decreased over time. This led to an improved quality of life for the patient, being able to spend more time with family and engage in light exercise.
Chat fiction story is basically a story told through a chat - style layout. It often has a very modern and relatable feel since it resembles our daily digital conversations. You can find different types of chat fiction, like romantic ones where the two lovers' chat is the whole story, or mystery ones where clues are revealed through chat exchanges.
Well, he could find himself in an AU where the Hogwarts houses are based on different criteria. He might then have to help students adjust to this new system. He could also stumble upon a world where the Deathly Hallows have a different significance or are even unknown. This would lead him on a quest to understand their new meaning and how they relate to the balance of power in that universe.
In the 'Percy goes back in time fanfic', he may also meet his younger self. This could lead to some really interesting and confusing situations. He would have to be careful not to disrupt the timeline too much while still achieving whatever his goal is for going back in time.
A lesser - known but really interesting fanfic is 'Laxus and Natsu: Unlikely Allies'. It starts with a big misunderstanding between them but as the story progresses, they discover that they have more in common than they thought, especially when it comes to protecting their guild and its members.
An interesting concept could be Ichigo crossing over into a fantasy world and being abandoned in a forest filled with magical creatures. He has to quickly adapt, learn about the new magic system, and fight against the prejudices of the native creatures who see him as an outsider. His journey could involve finding a way back home while also protecting this new world from a hidden threat.
Since I don't know the details of the 'equalizer boy story', I can't say for sure who the main character is. But based on the title, it's likely that the 'equalizer boy' is the main character.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics, including many about Batman and Catwoman. You can use the search function to look for specific tags related to 'grind' or their relationship.
The Vulture could also be a major antagonist. His ability to fly and his sharp talons pose a great threat. Maybe he teams up with some other villains in the fanfiction to take on the two spiders at once. He could be stealing valuable items from around the city and Spider - Man and Spider - Gwen have to stop him.
You can try looking for it in local bookstores. Some big chain bookstores might have a section dedicated to light novels and it could be there. If not, you can also check online platforms like Amazon. They usually have a wide range of books, including light novels.