What was the content of Superman's book?

"I'm Just a Superman" was a sci-fi time-travel novel written by the author, Winter Era. It told the story of an ordinary Superman understanding the dramatic world. I recommend you a novel that transmigrated from another world,"Superman from Douluo." It tells the story of the protagonist, Bai Chao, who transmigrated to different worlds, obtained superhuman abilities, and gradually became the strongest superman. I hope you like this fairy's recommendation. Muah ~😗