How to get publishers to invest in your book (+ resources)

Hello friends, I hope you're doing well. This summer I've been talking with various industry folks about what their writer audiences need most when it comes to learning about how to market and brand themselves. It's been an inspiring learning experience and now I have more ideas than I can execute quickly enough LOL. One of the common misconceptions writers have is that you should have a book deal before you start working on your author brand and platform. I get the logic, but what's...