Ask.
Here’s the not-fun news about having a book coming out: you have to get out of your lil bubbly creative comfort zone and ask people for help. The help that you’re not paying for, but people’s time and creative energy. For me, for whom these are my most greedily hoarded resources, this is hard hard hard to do. It’s not my default to ask for things. I always assume the other person will groan inwardly at a request from one more writer coming at them, palm up.
But we all know what happens when you assume, right?