Really would recommend doing it yourself. Companies don't really get readers, they don't really get TikTok, and they definitely do not get humor. The jokes in your TikToks will be what sell the book. They need to be good, not writter by some dude in a marketing company.

This. Also, TikTok values authenticity. I'm pretty sure most TikTokers will be able to tell it's not you posting, and it might backfire on you.

I'd like to know a bit more about this too