If it were easy, anyone could do it.
Are you a writer? This actually happens to nonfiction writers too. Here are some of the reasons authors and would-be authors have shared with us. And guess what? Then you will be ready to think about voice. I would make a suggestion and she would put it into words, what I in visioned.
Send it to the publisher, release it on Amazon, do whatever you need to do to get it in front of people. For my novels, I often use these to come up with ethnically accurate character names.
Decide based on the reader as your priority.