Don't put cart before horse
Nateskate said:
Okay. Sounds easier for me. Will they ask you about your ideas?
Next question: If you have ideas for illustrations which I have, and eventually want to see, does the illustrator then have to get permission from your publisher, or from you, or both. Is that a "negotiated right" to be aware of?
Publishers will be amenable to suggestions from the author, certainly. This of course assumes that the publisher plans a hardcover (or fancy paperback) edition of your famous novel that will contain illustrations.
Understand that such a possibility is quite rare -- ask yourself how many new writers get illustrated editions? Zero, zip, nada is the probable answer.
So AFTER your agent is agreed with you about illustrations, and AFTER your book gets sold, THEN you can approach the publisher with your ideas for illustrations. And if you have a particular artist in mind, the publisher will be happy to listen to you. Just understand that the answer may likely be "No."
Example - In one of my magazine articles, I had already been accepted for publication, and then I called the editor and asked whether some photos might be added. She said "sure" but we reserve the right to reject the pics. We chatted a bit and she gave me a dollar figure for the photos, IF they accepted them.
I got with a professional photog pal and he took the pics, which were accepted, and he got paid nicely, separately from me. He however did understand that the photos might be rejected and his time would be unpaid.
Just remember that this was AFTER my article was accepted without photos.
The next time the editor approved the photos up front, because the original submissions were so nice, and we had a "proven" track record.
My recommendation is that you focus on working with your agent to get your book sold in the first place, and make illustrations a side issue. Otherwise, you may unconsciously detract from your verbal "painting" and emphasize the illustrations that don't exist in the first place. Put all your effort into the text.
That being said, if you have a separate, sidebar interest in the illustrations, there's nothing wrong about toying with possible ideas and concepts. Just don't let it detract from the words.