Dr. Credit King Credit Connection

I'm ready to invest in professional help for my book, but I'm overwhelmed by all the options claiming to be the best ghostwriting company in USA. How do I actually separate trustworthy companies from those that just have good marketing? What specific credentials, reviews, or red flags should I look for when evaluating a ghostwriting company in USA? Have any authors here worked with a US-based company that truly delivered quality work and protected their voice? I'd appreciate honest recommendations for the best ghostwriting company in USA that you've personally trusted with your project.