I have a three book (so far) fiction series published through (book one) Amazon Encore and (books twos two and three) Booktrope Editions. I also have a novella with Booktrope as well as another one which I've self published. All have excellent and predominantly verified reviews on Amazon and sell well. I also edit fiction and nonfiction and am a published freelance writer.
My question is, given my writing experience (I am not bragging. I realize there are many more authors with more experience) would an agent (in general) be willing to work with me with a piece of fiction I'm working on but is not finished? I'd like to present a story synopsis and wonder an agent would be willing provide insight etc. to create a mutually beneficial fiction piece to then have that agent submit to publishers.
I suspect the answer is some version of, "Absolutely not", but I've had many peers send in manuscripts an agent has turned down because they weren't the right story. I thought maybe it would be advantageous for both to work on a concept together.
Here's why: a query letter (regardless of publication credits) that says "here's some of a novel, can you give me some insight on how to finish this to make it something publishers will snap right up" demonstrates a severe misunderstanding of what my job actually is.
My job is to sell your work. It's NOT to edit, proofread, copy edit, fact check, develop, bounce ideas off of, or anything other than sell, and then advocate for you during the publishing process.
Yes, I do all those other things, but they're generally for books that were sent to me as full, finished books. Books I loved and wanted to sell, and thus wanted to spruce up a bit before going out.
It sounds like what you want is for an agent to help you figure out what will sell.
If we knew, we'd tell you.
Well, no we wouldn't. We'd look for it, sign it and sell it and keep our mouths shut.
The best thing I can tell you here is write the book that only you can write. Write the book that you're passionate about, that if someone tells you it's not the right story, you know they're wrong.