I can help you directly with four different aspects of the publishing process:
For manuscript evaluation to see if you’ve got something worth pursuing as a story (fiction) or topic analysis (nonfiction), check out my Manuscript Evaluation page.
For developmental editing (helping with the overall structure and outline of chapters and flow of story or argument/ideas), check out my Developmental Editing page.
For copy or line editing and/or proofreading, check out my Copy Editing & Proofing page.
I also still do some book indexing, which was my first publishing-related business. I do this kind of work along with general content strategy and taxonomy work over at Potomac Indexing, LLC. Check out the PI site for more information.