After researching a lot of different designers, I went with Ebook Launch for my debut novel because there wasn't a single cover in their portfolio I didn't like. I didn't know exactly what I wanted, but I knew what I liked and what I didn't like, and they took my mishmash of half-formed ideas and turned it into a beautiful, eye-catching, genre-appropriate design! Not only that, but they were speedy, responsive, and accessible. A real pleasure to work with. I will definitely be coming back to them for the rest of the covers in the series.
Once you have narrowed your options down to a few editors, five or less for example, set up some initial contact with each of the children’s book editors. Start by contacting them and see if they can answer your core questions via email. Find out if they are willing to chat with you by phone or skype about your project when you are ready to make a decision. Ask for them to specifically identify what children’s book editorial services they will be able to provide.
Stephen, I’m not sure what you mean by “time wasted matching a style guide.” Any professional editor of trade books knows the Chicago Manual of Style well and as a matter of course automatically makes changes that are in line with it. What you said is akin to “They waste time correcting spelling errors.” They’re not wasting any time; they’re doing their job and it’s a basic and automatic part of that job.
In fact, Pressfield writes, “Resistance is experienced as fear; the degree of fear equates to the strength of Resistance. Therefore the more fear we feel about a specific enterprise, the more certain we can be that that enterprise is important to us and to the growth of our soul. That’s why we feel so much Resistance. If it meant nothing to us, there’d be no Resistance.”