There's stories online of authors being published by a traditional big house publisher who feel their covers didn't represent their book well, but had no say in the matter. (bookcovercafe.com)
Finding an amazing illustrator who can interpret and represent your book accurately is not easy, but it's incredibly important. (portlandbookreview.com)
Finding literary agencies that represent your book genre or category can be a challenge, but this article will help. (literary-agents.com)