How Do Professional Book Writing Services Work?

I’ve been exploring book writing services in the USA, and I’m curious about how they actually work. I know they help authors with writing, editing, and even publishing, but I’d love to hear from those who have used these services before!

From what I understand, professional book writing services offer ghostwriting, editing, formatting, and even marketing support. Some even help with self-publishing and traditional publishing. But I’m wondering—how involved is the author in the process? Do you get to guide the writer, or do they just take your idea and run with it? Also, how do you ensure the final book truly reflects your voice and vision?

For those who have used these services, what was your experience like? Did you find them helpful, or would you recommend a different approach? Any suggestions for reliable book writing services in the USA?

Looking forward to your insights!