Because I don't know which incident you're referring to. If you can provide more background information, I will try my best to help you confirm the authenticity of this incident.
I think it's fictional. In a real circus, there are ethical and safety regulations. Sewing a man into an ape suit is not only inhumane but also goes against basic safety and health standards. Most circus stories with such extreme elements are usually made up to add an element of the bizarre and draw in audiences with the shock value.
Well, the real story of Monarch Godzilla is quite complex. Monarch has various outposts around the world to keep an eye on Godzilla and other Titans. Godzilla, he's not just a big monster. He has a connection to the balance of the Earth's ecosystem. Monarch scientists study his behavior, his movements, and try to figure out how his presence affects the environment. For example, his battles with other Titans can reshape landscapes. And Monarch is in the middle of all this, trying to maintain some sort of order.
Godzilla is purely fictional. It originated in the world of cinema and has no basis in actual events or real-life occurrences. The concept was dreamed up for entertainment purposes.
I'm not sure which novel 'the man in the brown suit novel' is specifically. There could be many novels with such a title or a similar description. So, unfortunately, I can't tell you the author.
I'm not entirely sure as I haven't read it in detail. But generally, it might be about a man who is characterized by the brown suit he wears, and perhaps his adventures, relationships or a mystery he is involved in.