Sorry, I haven't read this novel specifically. But generally, a story about picking up a hammer to save the world might involve a hero's journey. The hammer could be a magical or powerful tool. Maybe the protagonist discovers the hammer's special abilities and uses it to fight against great evils threatening the world.
Well, a few characters have managed to pick up Thor's hammer. Besides Captain America, there's also Beta Ray Bill and Jane Foster, among others. Each had their own circumstances and reasons for being worthy.
Well, it could be really interesting. Maybe in this fanfiction, Peter Parker picks up Thor's hammer during a big battle. This act would not only shock everyone around him but also change the course of the battle. With the hammer, he could fly faster and strike with more force. And it would also likely have an impact on his relationships with other superheroes. They might see him in a whole new light, as someone who is not just a friendly neighborhood Spider - Man but also a worthy wielder of a powerful Asgardian weapon.
It could be Loki. Since Peter has picked up Thor's hammer, Loki might see him as a new threat. Loki is always after power and causing chaos, and Peter with the hammer would be a powerful force to oppose him.
Li Jiucheng of the World Bank was the main character of the novel " Copper Hammer." This novel was a fantasy novel that described the growth of a martial artist with the power of a copper hammer and his struggles and confrontations with various forces.
You might try looking at local comic book stores or online platforms dedicated to manga. Some popular ones include Amazon or specialized manga websites.