Someone Recommend The Professional Nonfiction Writers Company That I Can Hire Immediately

I’m a researcher and a writer. I have been writing a book based on the psychology that is entirely based on the introverts. I have also received my degree in psychology and the book I’m writing is the reflection of the research paper that I wrote quite some time ago. Due to my busy schedule it is getting difficult to complete the book on time. Can someone kindly recommend the best and the professional non fiction writers company USA that also has the ghostwriters who can help me with anonymity? It will be a big help if I can get the useful recommendations soon.