Are There Book Writing Services That Specialize in Fiction, Non-Fiction, or Business Books?

I’ve been researching book writing services in USA, and I’m wondering—are there services that specialize in specific genres like fiction, non-fiction, or business books? I imagine writing a novel requires a different skill set compared to crafting a self-help or business book.

For those who have worked with a professional book writing service, did you find one that focused on your specific genre? Did their expertise make a difference in the final outcome? Also, how do these services handle things like storytelling, research, and industry-specific knowledge?

If you’ve used a writing service, I’d love to hear about your experience! Did you feel they truly understood your vision? Were they able to match your tone and style?