Books are souvenirs that hold ideas. Ideas are free. If no one knows about your idea, you fail. If your idea doesn’t spread, you fail. If your idea spreads but no one wants to own the souvenir edition, you fail.
Book publishers don’t make authors successful (clarification: 175,000 new authors a year, 300 become successful because of publishers). Authors make themselves successful by earning the privilege of having a platform, by creating ideas that spread, and yes, by building a tribe. (Harry Potter anyone?)
This is so very important that I had to bold the first paragraph. It’s not the book. It’s the idea. Set your idea free.